scholarly journals Aspicular Bone Marrow Aspiration: A Common, but Not a Minor Problem

Blood ◽  
2019 ◽  
Vol 134 (Supplement_1) ◽  
pp. 5841-5841
Author(s):  
Jose Angel Hawing ◽  
Olga Graciela Cantu Rodriguez ◽  
Andrés Gómez-De León ◽  
Consuelo Mancias ◽  
Luz del Carmen Tarín Arzaga ◽  
...  

Bone marrow (BM) aspiration plays an important role in hematologic malignancies diagnosis. Access and cost of diagnostic flow cytometry remains a problem in low and middle-income countries. In this context, morphological diagnosis by BM smear often represents the only means to rapidly diagnose our patients. Therefore, in this context obtaining the highest quality sample possible during the procedure is paramount. Despite being a well-known problem, evidence-based recommendations to improve BM aspirate quality are few, with studies evaluating factors associated with poor quality samples lacking. Objectives To determine factors associated with poor quality BM aspirates defined by an aspicular or hemodiluted sample in a hematology referral center. Materials and methods We conducted a retrospective study in our University Hospital and analyzed the BM smear samples stored in our center performed from October 2014 to December 2018. We collected and analyzed data based on diagnosis, age, gender, recent chemotherapy, and the variables of a complete blood count performed just before each BM aspiration. The quality of the BM smear was defined in any of the following: aspicular (without spicules), pauciaspicular (1-3 spicules), spicular (> 3 spicules), defining aspicular BM smear as non-diagnostic samples. Univariate analysis was performed looking for diferences between operators (in a 3-year residency program). In the other hand, in the multivariate analysis we seek to reveal the factors associated with obtaining hemodiluted (aspicular) bone marrow aspirate-smears. Results A total of 1,073 BM aspirates were evaluated. Hematology fellows performed 97% of BM aspirates; the remaining 3% were performed by attending physicians. In our analysis, 301 aspirates were aspicular, constituting 28.1% of the total number of aspirate smears. Most BM aspirates were performed for a diagnostic evaluation (66.3%) with the rest of the procedures for subsequent hematologic malignancy response assessments. In the univariate analysis, no differences were observed between operators. In a multivariate analysis the presence of an age >65 years (OR 3.1, 95% CI 2.3 to 4.1) and hemoglobin <6.0 g/dL (OR 2.7, 95% CI 1.4 to 4.5) at the time of the procedure were significantly associated to obtaining a non-diagnostic sample. Diagnosis, WBC count, platelet count, operator experience or other variables did not show statistical relevance. In our center, 18.81% of diagnostic patient samples that had acute leukemia were diagnosed without flow cytometry and through BM aspirate morphology alone. A second procedure to reach a diagnosis was necessary in 7.97% of the patients due to aspicular samples, obtaining a mean of diagnostic-treatment delay of 18.3 days (±5.7 days). Conclusions We found no differences between operators, emphasizing that there are other factors to consider in addition to a correct BM aspiration technique or operator experience. We believe this is crucial to recognize, especially in developing countries where morphological diagnosis remains the only means for the diagnosis or response evaluation of our patients. BM aspirate sample quality is multifactorial, being age and hemoglobin important factors. In addition, obtaining aspicular or hemodiluted samples represents not only a diagnostic challenge, but also delays the treatment of our patients. Disclosures Gomez-Almaguer: Celgene: Consultancy, Speakers Bureau; Takeda: Consultancy, Speakers Bureau; Teva: Consultancy, Speakers Bureau; Amgen: Consultancy, Speakers Bureau; Janssen: Consultancy, Speakers Bureau.

2019 ◽  
Vol 130 (5) ◽  
pp. 1692-1698 ◽  
Author(s):  
Mitchell P. Wilson ◽  
Andrew S. Jack ◽  
Andrew Nataraj ◽  
Michael Chow

OBJECTIVEReadmission to the hospital within 30 days of discharge is used as a surrogate marker for quality and value of care in the United States (US) healthcare system. Concern exists regarding the value of 30-day readmission as a quality of care metric in neurosurgical patients. Few studies have assessed 30-day readmission rates in neurosurgical patients outside the US. The authors performed a retrospective review of all adult neurosurgical patients admitted to a single Canadian neurosurgical academic center and who were discharged to home to assess for the all-cause 30-day readmission rate, unplanned 30-day readmission rate, and avoidable 30-day readmission rate.METHODSA retrospective review was performed assessing 30-day readmission rates after discharge to home in all neurosurgical patients admitted to a single academic neurosurgical center from January 1, 2011, to December 31, 2011. The primary outcomes included rates of all-cause, unplanned, and avoidable readmissions within 30 days of discharge. Secondary outcomes included factors associated with unplanned and avoidable 30-day readmissions.RESULTSA total of 184 of 950 patients (19.4%) were readmitted to the hospital within 30 days of discharge. One-hundred three patients (10.8%) were readmitted for an unplanned reason and 81 (8.5%) were readmitted for a planned or rescheduled operation. Only 19 readmissions (10%) were for a potentially avoidable reason. Univariate analysis identified factors associated with readmission for a complication or persistent/worsening symptom, including age (p = 0.009), length of stay (p = 0.007), general neurosurgery diagnosis (p < 0.001), cranial pathology (p < 0.001), intensive care unit (ICU) admission (p < 0.001), number of initial admission operations (p = 0.01), and shunt procedures (p < 0.001). Multivariate analysis identified predictive factors of readmission, including diagnosis (p = 0.002, OR 2.4, 95% CI 1.4–5.3), cranial pathology (p = 0.002, OR 2.7, 95% CI 1.4–5.3), ICU admission (p = 0.004, OR 2.4, 95% CI 1.3–4.2), and number of first admission operations (p = 0.01, OR 0.51, 95% CI 0.3–0.87). Univariate analysis performed to identify factors associated with potentially avoidable readmissions included length of stay (p = 0.03), diagnosis (p < 0.001), cranial pathology (p = 0.02), and shunt procedures (p < 0.001). Multivariate analysis identified only shunt procedures as a predictive factor for avoidable readmission (p = 0.02, OR 5.6, 95% CI 1.4–22.8).CONCLUSIONSAlmost one-fifth of neurosurgical patients were readmitted within 30 days of discharge. However, only about half of these patients were admitted for an unplanned reason, and only 10% of all readmissions were potentially avoidable. This study demonstrates unique challenges encountered in a publicly funded healthcare setting and supports the growing literature suggesting 30-day readmission rates may serve as an inappropriate quality of care metric in neurosurgical patients. Potentially avoidable readmissions can be predicted, and further research assessing predictors of avoidable readmissions is warranted.


2019 ◽  
Vol 40 (4) ◽  
pp. 1477
Author(s):  
Fernanda dos Santos Alves ◽  
Breno Curty Barbosa ◽  
Nathalia Dorneles das Graças Coelho ◽  
Paula Costa de Oliveira Pinto ◽  
Marco Túlio Gomes Campos ◽  
...  

Parvoviral enteritis is a common viral infection in dogs and is associated with many clinical and hematological changes. Bacterial translocation is a common complication and may result in sepsis. The objective of this study is to determine the presence of clinical and hematological factors associated with the risk of death in puppies with naturally occurring parvoviral enteritis and sepsis. Twenty-four dogs with parvoviral enteritis confirmed by chromatographic immunoassay during the clinical routine of a university veterinary hospital were selected. At admission and every 24 hours until the third day of hospitalization or until death, venous blood samples were collected for complete blood count, renal and hepatic biochemistry, and lactate and magnesium measurement; arterial blood samples were collected for gas analysis. Sodium, potassium, and ionized calcium were also analyzed, and a complete physical examination was performed. The factors associated with mortality were evaluated by Cox univariate analysis at a level of significance of 5%. The increase in urea and heart rate was associated with an increase in the risk of death. In contrast, an increase in total leukocytes, lymphocytes, monocytes, partial pressure of oxygen, base deficit, bicarbonate ion, and oxygen saturation were associated with a reduction in the risk of death.


2018 ◽  
Vol 44 (1) ◽  
pp. 12-17 ◽  
Author(s):  
Silvia de Souza Campos Fernandes ◽  
Dirceu Solé ◽  
Paulo Camargos ◽  
Cláudia Ribeiro de Andrade ◽  
Cássio da Cunha Ibiapina

ABSTRACT Objective: To evaluate risk factors associated with asthma symptoms in adolescents in the 13- to 14-year age bracket. Methods: This was a cross-sectional study involving adolescents enrolled in randomly selected public schools in the city of Belo Horizonte, Brazil, and conducted with the use of the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire and its supplementary module for risk factor assessment. The ISAAC questionnaire was completed by the students themselves, whereas the supplementary questionnaire was completed by their parents or legal guardians. Variables showing p ≤ 0.25 in the univariate analysis were included in the multivariate analysis. Stepwise regression with backward elimination was used for variable selection. Results: We evaluated 375 adolescents, 124 (33.1%) of whom had asthma symptoms. The final multivariate analysis model revealed that asthma symptoms were associated with birth weight < 2,500 g (p < 0.001), day care center or nursery attendance (p < 0.002), maternal history of asthma (p < 0.001), contact with animals during the first year of life (p < 0.027), current contact with animals outside the home (dogs, cats, or farm animals; p < 0.005), and more than 20 cigarettes per day smoked by parents or other household members (p < 0.02). Conclusions: Exposure to animals in and outside the home is associated with asthma symptoms, as is environmental tobacco smoke exposure. Families, health professionals, and administrators of health care facilities should take that into account in order to prevent asthma and reduce asthma morbidity.


2016 ◽  
Vol 130 (7) ◽  
pp. 669-673 ◽  
Author(s):  
R W A Hone ◽  
T Tikka ◽  
A I Kaleva ◽  
A Hoey ◽  
V Alexander ◽  
...  

AbstractBackground:Inadvertent (or incidental) parathyroidectomy can occur during thyroidectomy. However, the factors associated with inadvertent parathyroidectomy remain unclear. This study aimed to report the rate of inadvertent parathyroidectomy during thyroidectomy and associated risk factors.Methods:Variables including fine needle aspiration cytology findings, age, sex, thyroid weight, concurrent neck dissection, extent of thyroidectomy, and the presence of cancer and parathyroid tissue within the specimen were recorded for 266 patients. The incidence of post-operative hypocalcaemia was also recorded. Univariate and multivariate analysis were performed to identify factors associated with inadvertent parathyroidectomy.Results:The inadvertent parathyroidectomy rate was 16 per cent. Univariate analysis revealed that cancer and concurrent neck dissection predicted inadvertent parathyroidectomy. On multivariate analysis, only concurrent neck dissection remained an independent predictor of inadvertent parathyroidectomy: it was associated with a fourfold increase in inadvertent parathyroidectomy.Conclusion:The inadvertent parathyroidectomy rate was 16 per cent and concurrent neck dissection was identified as an independent predictor of inadvertent parathyroidectomy.


2016 ◽  
Vol 8 (1) ◽  
pp. 34-39
Author(s):  
Woo Young Kim ◽  
Jeonghun Lee ◽  
Euy-Young Soh

ABSTRACT BACKGROUND AND AIMS Papillary thyroid cancer (PTC) is the most frequent subtype among thyroid cancers. Lymph node (LN) metastases are frequent in PTC and the incidence is 60% on average. Recent studies have shown that there has been an increase in the mortality or recurrence with LN metastases and that more than 5 metastatic LNs are clinically important. Therefore, we investigated clinicopathologic factors associated with clinically important LN metastases. METHODS From January 2010 to October 2013, we retrospectively enrolled 2,628 PTC patients who underwent thyroidectomy at Ajou University Hospital. Among 1,425 patients with LN metastasis, 325 had ≥ 5 LN metastases. RESULTS In univariate analysis, young age (< 45 year), male gender, capsular invasion, multiplicity, tumor size, and lymphovascular invasion (p < 0.001) were statistically associated with both LN metastasis and ≥ 5 LN metastases. However, Braking Action Fair (BRAF) mutation was not important to predict LN metastasis (p > 0.05). In multivariate analysis, lymphovascular invasion was the most important factor (odds ratio: 4.7, 4.0) among other clinicopathologic factors (odds ratio:< 2.1). CONCLUSION Braking Action Fair (BRAF) mutation was not useful to predict the LN metastasis. However, lymphovascular invasion was the most important factor to predict more than five cervical LN metastasis which is very important clinically.


Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 1158-1158
Author(s):  
Elias J. Anaissie ◽  
Marisa H. Miceli ◽  
Li Dong ◽  
Monica L. Grazziutti ◽  
Sabitha Rajan ◽  
...  

Abstract Background: MEL-ASCT is standard therapy for multiple myeloma (MM) but is associated with severe infections, at times life-threatening. Objective: To determine the risk factors for severe infection (bacteremia, septic shock, colitis, pneumonia) following MEL - ASCT for MM. Materials and Methods: 382 consecutive MM patients (pts) enrolled in our Total Therapy 2 protocol and who received their first MEL - ASCT between 10/1998 and 12/2002 were included. Variables evaluated included age, sex and MM remission status, severity of mucositis and others. Because of the known association between increased body iron stores and infection, pre-ASCT bone marrow (BM) iron stores were also evaluated. The AUC for severe neutropenia (<100 absolute neutrophils (ANC) / mL) was used as a single variable accounting for both the depth and duration of neutropenia. Results: Median age was 56 years (range: 30–76) and 235 pts (62 %) were males. Severe infections developed in 77 pts (20%) including pneumonia (42 pts). Pre-ASCT risk factors for infection by univariate analysis were increased BM iron stores (OR= 3.601; 95%CI 1.795–7.222; p<0.0007) and low platelets counts (OR for -1000 platelets/μL = 0.997; 95% CI 0.994 – 1; p=0.0381). Increased BM iron stores remained significant by multivariate analysis (OR= 3.601; 95% CI 1.795–7.222; p<0.0007). Post-ASCT risk factors that were significant by both univariate and multivariate analysis were severe mucositis (Grades 3–4 by NCI Common Toxicity Criteria) (OR=1.916; 95% 1.093–3.36; p=0.02) and AUC of severe neutropenia (OR= 1.001/unit; 95% 1–1.002; p=0.03). Neither the duration (days with ANC <1000 / mL) nor the depth of moderate neutropenia (AUC < 1000 neutrophils / mL) predicted infection. Conclusion: MM pts scheduled to undergo MEL - ASCT and who have increased BM iron stores, and those who develop severe mucositis and / or prolonged and profound neutropenia following ASCT should be considered at greater risk for developing severe infection. AUC of severe neutropenia is a useful single marker of both depth and duration of neutropenia and should be included in studies evaluating risk for infection in neutropenic pts.


Author(s):  
J. Kannan ◽  
Amit Saklani ◽  
Srigopal Mohanty ◽  
Kiranmayee Narapaneni ◽  
Deepak George ◽  
...  

Background: Metastatic cervical cancer carries poor prognosis. The factors associated with distant metastasis in newly diagnosed cervical cancer patients are not clear.Methods: A retrospective analytical study was performed to study the pattern of distant metastasis, and to evaluate the factors associated with de-novo metastatic cervical cancer. Univariate and multivariate analysis (by MANOVA) were used to evaluate the association. P≤0.05 was considered significant.Results: Out of 1321 newly diagnosed cervical cancer patients, 54 (4.1%) had de-novo metastatic disease and most of which (81%) were found at single site. Common sites of distant metastasis were non-regional nodes, followed by liver, lung, peritoneum and bone. Univariate analysis showed the factors associated with de-novo metastasis were non squamous subtype, high grade histology, bulky primary tumor (>4 cm), pelvic/para-aortic lymphadenopathy, and hydroureteronephrosis. Multivariate analysis revealed the factors associated with de-novo metastasis were bulky primary tumor (>4 cm), high grade histology, pelvic/para aortic lymphadenopathy, hydroureteronephrosis.Conclusions: Newly diagnosed cervical cancer patients with bulky primary tumor, high grade histology, pelvic or para aortic lymphadenopathy, hydroureteronephrosis are associated with higher risk of de-novo distant metastasis.


Blood ◽  
2013 ◽  
Vol 122 (21) ◽  
pp. 3371-3371 ◽  
Author(s):  
Luisa Giaccone ◽  
Lucia Brunello ◽  
Roberto Passera ◽  
Moreno Festuccia ◽  
Milena Gilestro ◽  
...  

Abstract Background Minimal residual disease (MRD) by multiparameter flow-cytometry recently showed a promising role in predicting outcomes in patients with multiple myeloma. However, data on immunophenotypic response (IR) after allografting are lacking. Aim To evaluate the impact of IR and compare it to conventional complete remission (CR) following allografting in myeloma patients. Methods Sixty-six consecutive patients, median age 54 years (35-66), who underwent an allograft between January 2000 and December 2011 with a follow-up of at least 3 months were included. Disease response was evaluated by serum and urine electrophoresis, and bone marrow aspirate at baseline, 3, 6, 12, 18, 24 months after transplant and yearly thereafter. Skeletal survey or MRI were performed yearly or as clinically indicated (overt relapse or complaints of bone pain). Bone marrow aspirates had to contain at least 13000 cells/µL for flow-cytometry studies and IR was defined as absence of monoclonal plasma-cells detected by 4 or 6-colour staining with the following antibodies: CD38, CD138, CD56, CD19, CD45, cyKappa, cyLambda. CR was defined according to standard criteria (Durie et al, Leukemia 2006; 20:1467-73). Results Conditioning regimen was non-myeloablative 2Gy TBI-based in 55 patients, reduced intensity (fludarabine-melphalan-based) in 10 and myeloablative in 1 patient. Post-grafting immunosuppression consisted of cyclosporine with mycophenolate mofetil or methotrexate. Donors were HLA identical siblings in 58 patients and unrelated in 8. Only 1 patient received bone marrow as source of stem cells. Thirty-five/66 (53%) received the allograft as part of the first line treatment, whereas the remaining 31/66, (47%) were transplanted at relapse. At the time of transplant, 5/66 were both in IR and CR, 16 were only in IR and 4 patients were only in clinical CR. All 21 patients in IR at the time of transplant maintained it, while 26/45 (58%) entered IR after the allograft. Among patients surviving at least 3 months, overall treatment related mortality was 10.6% at 3 years. After a median follow-up of 69 months (range 19-147), the incidence of acute and chronic graft-versus-host disease was 45.6% and 49.3% without significant difference between responsive and non-responsive patients. At follow-up, overall, 24 patients achieved CR and IR (CR/IR group), 21 achieved IR but not CR because of persistence of urine/serum M-component (noCR/IR group), and 21 did not achieve either CR or IR (noCR/noIR group). Interestingly, none achieved CR without IR. Median overall survival (OS) and event-free survival (EFS) in patients who achieved IR were 96 and 55 months versus 36 and 7 months in those who did not (p<0.001). Median OS and EFS were not reached and 59 months in the CR/IR group, 77 and 15 months in the noCR/IR, and 30 and 5 months in the noCR/noIR respectively (p<0.001 for both EFS and OS-fig.1). In univariate analysis, being in the CR/IR group was the only significant predictor for prolonged OS and EFS (p<0.001). Of note, cumulative incidence of extra-medullary disease at first relapse after the allograft was 4% in the CR/IR, 32% in the noCR/IR and 15% in the noCR/noIR groups respectively (p<0.001). Receiving the allograft as first line therapy or later during the disease course did not significantly impact on OS and EFS. Conclusion The achievement of IR confers a favorable impact on OS and EFS after allografting. A higher incidence of extra-medullary in the noCR/IR group (some 30% of our patient cohort) may suggest that myeloma cells escape immune control outside the bone marrow. In this group, imaging studies such as positron emission tomography may clinically be indicated during follow-up to detect early relapse. Disclosures: No relevant conflicts of interest to declare.


Blood ◽  
2015 ◽  
Vol 126 (23) ◽  
pp. 4631-4631
Author(s):  
Haiyan Bao ◽  
Jia Chen ◽  
Xiaojin Wu ◽  
Xiao Ma ◽  
Chengcheng Fu ◽  
...  

Abstract Introduction: Stenotrophomonas maltophilia is an important nosocomial pathogen, particularly in immunocompromised patients, especially in patients with hematologic diseases. Methods: We reviewed the clinical characteristics and prognosis of patients with S. maltophilia bacteremia over a five-year period from January 2010 to December 2014. Species identification was performed using the automated Vitek 2 compact system (bioMe rieux). Results: The incidence of S. maltophilia bacteremia was 25.1 per 10 000 admissions in our study. Thirty-four patients (median age: 34 years; 64.7% males) with S. maltophilia bacteremia were analyzed. The S. maltophilia bacteremia related 30-day mortality was 44.1%. Risk factors associated with mortality in patients with S. maltophilia infection in the univariate and multivariate analysis were represented in Tables I and II. In the univariate analysis, risk factors included T>39.0¡æ, septic shock, respiratory failure and non-remission after treatment for primary hematological diseases (P <0.05). In the multivariate analysis, respiratory failure and non-remission status after treatment forhematological diseases were independent prognostic factors for mortality. In vitro susceptibility was higher to ciprofloxacin(82.4%), ceftazidime(70.6%), sulbactam and cefoperazone(58.8%), which was shown in Table III. Conclusion: Combination regimens with ciprofloxacin and ceftazidime, or sulbactam and cefoperazone could be alternative treatment. Novel antibiotics are required for treatment of S. maltophilia infection, as well as infection control practices of environmental reserves, rapid detection of pathogens, risk stratification strategy and appropriate treatment for primary hematologic malignancies, which might conjointly contribute to better survival outcome of S. maltophilia bacteremia. Univariate analysis of prognostic factors associated with mortality from S. maltophilia bacteremia Table 1. Factor Mortality HR 95%CI P-value Withfactor Withoutfactor T>39.0¡æ 75% 16.7% 2.490 1.318-4.704 0.005 Septic shock 90.0% 25.0% 2.544 1.473-4.393 0.001 Respiratory failure 100% 20.8% 4.672 2.366-9.225 0.000 Treatment outcome for hematological diseases Remission 10.0% 85.7% 0.247 0.116-0.526 0.000 HR, hazard ratio; CI, confidence interval; HSCT, Hematopoietic stem cell transplantation Table 2. Multivariate analysis of prognostic factors associated with mortality from S. maltophilia bacteremia Factor HR 95%CI P-value Respiratory failure 2.688 1.297-5.569 0.008 Remission after treatment for hematological diseases 0.367 0.153-0.879 0.025 HR, hazard ratio; CI, confidence interval Table 3. Susceptibility pattern of the 34 patients with Stenotrophomonas maltophilia bacteremia Antimicrobial agents S (%) I (%) Ceftazidime 24(70.6%) 1(2.9%) Cefoperazone 19(44.1%) 6(17.6%) Sulbactam and Cefoperazone 20(58.8%) 5(14.7%) Piperacillin 7(20.6%) 6(17.6%) Piperacillin-Tazobactam 11(32.3%) 7(20.6%) Amikacin 6(17.6%) 0(0%) Ciprofloxacin 28(82.4%) 1(2.9%) S, susceptible; I, intermediately susceptible. Disclosures No relevant conflicts of interest to declare.


2011 ◽  
Vol 48 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Jéfferson Luis de Almeida Silva ◽  
Veridiana Sales Barbosa de Souza ◽  
Tatiana Aguiar Santos Vilella ◽  
Ana Lúcia C. Domingues ◽  
Maria Rosângela Cunha Duarte Coêlho

CONTEXT: Blood transfusion is one of the major risk factors for the transmission of the hepatitis B (HBV) and C (HCV) viruses. However, there are no reports describing the endoscopic transmission of these viruses in patients with the hepatosplenic form of schistosomiasis. OBJECTIVE: To estimate the prevalence of serological markers of HBV and HCV in patients with the hepatosplenic form of schistosomiasis and evaluate the possible risk factors associated with these infections. METHODS: A cross-sectional study was conducted on 230 patients with hepatosplenic form of schistosomiasis who attended a university hospital in Recife, Northeastern Brazil, from February to August 2008. The patients answered a standardized questionnaire about risk factors. Serum samples were analyzed for anti-HBc total, anti-HBs, HBsAg, and anti-HCV using enzyme-linked immunosorbent assays. Univariate analysis and multiple logistic regression were performed. RESULTS: The prevalence was 30% for anti-HBc total and/or HBsAg and 7.4% for anti-HCV. There was a higher frequency of the serological markers in females and in patients aged .50 years. A significant association was detected between the presence of anti-HCV and the receipt of six or more blood transfusions. There was no association of history and number of digestive endoscopies with the serological markers analyzed. CONCLUSIONS: We observed a higher prevalence of serological markers for HBV and a lower prevalence of anti-HCV. Our results indicate that females and patients of an advanced age are the most affected categories and that patients that received multiple transfusions are at a higher probability of HCV infection.


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