scholarly journals Assessment of Hip Involvement in Patients With Ankylosing Spondylitis: The Reliability Between the HIMRISS and BASRI-Hip System

2021 ◽  
Author(s):  
Siliang Man ◽  
Liang Zhang ◽  
Tao Bian ◽  
Hongchao Li ◽  
Zhuyi Ma ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Scoring System ◽  
Disease Activity Score ◽  
Activity Index ◽  
Intraclass Correlation ◽  
Activity Score ◽  
Functional Index ◽  
Group A ◽  
Group B

Abstract Background. The aim is to test the reliability and validity of the Hip Inflammation MRI Scoring System (HIMRISS) in assessing hip involvement of AS patients at different stages of the bath ankylosing spondylitis radiology index (BASRI-hip) scoring system.Methods. Fifty-two outpatients with ankylosing spondylitis(AS) were included in this study. The subjects’ data includes demographics, clinical characteristics, disease activity score, and functional index. Based on the Harris hip scoring (HHS) of involved hip and BASRI-hip score, we devided these patients into no hip involvement group(HHS≥80 and BASRI≤1)(Group A), mild hip involvement subgroup (BASRI=2 or BASRI≤1 and HHS≤79) (Group B) and moderate to advanced hip involvement subgroup (BASRI≥3) (Group C). Data was analyzed statistically by SPSS software.Results. In total of 44 patients (88 hips), group A consisted of 21 hips, group B consisted of 42 hips and group C consisted of 25 hips. The test-retest intraclass correlation coefficients (ICCs) in four raters were 0.955~0.977 and interrater ICC was 0.993. HIMRISS correlated moderately with the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) (r=0.540, p<0.001), the Bath ankylosing spondylitis functional index (BASFI) (r=0.581, p<0.001), ASDAS-ESR (r=0.604, p<0.001) and Ankylosing Spondylitis Disease Activity Score(ASDAS)- C reactive protein (CRP) (r=0.575, p<0.001). HIMRISS in group B and C was significantly higher than that in group A: 29.38（17.00，40.94）vs 14.50（11.38，22.25）, p=0.009; 38 (31.13，64.38）vs 14.50（11.38，22.25), p<0.001.Conclusions. HIMRISS applied to patients with AS demonstrated a satisfactory reliability, which means it is a reliable quantitive assessment tool for evaluating early hip involvement in patients with AS.

scholarly journals Assessment of hip involvement in patients with ankylosing spondylitis: reliability and validity of the Hip Inflammation MRI Scoring System

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Siliang Man ◽  
Liang Zhang ◽  
Tao Bian ◽  
Hongchao Li ◽  
Zhuyi Ma ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Scoring System ◽  
Disease Activity Score ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Activity Score ◽  
Functional Index ◽  
Group A ◽  
Group B

Abstract Background This study aimed to test the reliability and validity of the Hip Inflammation MRI Scoring System (HIMRISS) in assessing hip involvement of AS patients with AS at different stages of the bath ankylosing spondylitis radiology index (BASRI-hip) scoring system. Methods Fifty-two outpatients with ankylosing spondylitis (AS) were included in this study. The subjects’ data includes demographics, clinical characteristics, disease activity score, and functional index. Based on the Harris hip scoring (HHS) of involved hip and BASRI-hip score, we devided these patients into no hip involvement group((HHS ≥ 80 and BASRI ≤ 1) (Group A), mild hip involvement subgroup (BASRI = 2 or BASRI ≤ 1 and HHS ≤ 79) (Group B), and moderate to advanced hip involvement subgroup (BASRI ≥ 3) (Group C). Data was analyzed statistically by SPSS software. Results In total of 44 patients (88 hips), group A consisted of 21 hips, group B consisted of 42 hips and group C consisted of 25 hips. The test–retest intraclass correlation coefficients (ICCs) in four raters were 0.955 ~ 0.977 and interrater ICC was 0.993. HIMRISS correlated moderately with the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) (r = 0.540, p < 0.001), the Bath ankylosing spondylitis functional index (BASFI) (r = 0.540, p < 0.001), the Bath Ankylosing Spondylitis Functional Index (BASFI) (r = 0.581, p < 0.001), ASDAS-ESR (r = 0.604, p < 0.001), and Ankylosing Spondylitis Disease Activity Score (ASDAS)-C reactive protein (CRP) (r = 0.575, p < 0.001). HIMRISS in groups B and C was significantly higher than that in group A: 29.38 (17.00, 40.94) vs. 14.50 (11.38, 22.25), p = 0.009; 38 (31.13, 64.38) vs 14.50 (11.38, 22.25), p < 0.001. Conclusions HIMRISS applied to patients with AS demonstrated a satisfactory reliability, meaning it is a reliable quantitive assessment tool for evaluating early hip involvement in patients with AS.

DAS-driven therapy versus routine care in patients with recent-onset active rheumatoid arthritis

2009 ◽  
Vol 69 (01) ◽  
pp. 65-69 ◽  
Author(s):  
Y P M Goekoop-Ruiterman ◽  
J K de Vries-Bouwstra ◽  
P J S M Kerstens ◽  
M M J Nielen ◽  
K Vos ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Disease Activity ◽  
Disease Activity Score ◽  
Controlled Trial ◽  
Joint Damage ◽  
Routine Care ◽  
Activity Score ◽  
Recent Onset ◽  
Group A ◽  
Group B

Objectives:To compare the efficacy of Disease Activity Score (DAS)-driven therapy and routine care in patients with recent-onset rheumatoid arthritis.Methods:Patients with recent-onset rheumatoid arthritis receiving traditional antirheumatic therapy from either the BeSt study, a randomised controlled trial comparing different treatment strategies (group A), or two Early Arthritis Clinics (group B) were included. In group A, systematic DAS-driven treatment adjustments aimed to achieve low disease activity (DAS ⩽2.4). In group B, treatment was left to the discretion of the treating doctor. Functional ability (Health Assessment Questionnaire (HAQ)), Disease Activity Score in 28 joints (DAS28) and Sharp/van der Heijde radiographic score (SHS) were evaluated.Results:At baseline, patients in group A (n = 234) and group B (n = 201) had comparable demographic characteristics and a mean HAQ of 1.4. Group A had a longer median disease duration than group B (0.5 vs 0.4 years, p = 0.016), a higher mean DAS28 (6.1 vs 5.7, p<0.001), more rheumatoid factor-positive patients (66% vs 42%, p<0.001) and more patients with erosions (71% vs 53%, p<0.001). After 1 year, the HAQ improvement was 0.7 vs 0.5 (p = 0.029), and the percentage in remission (DAS28 <2.6) 31% vs 18% (p<0.005) in groups A and B, respectively. In group A, the median SHS progression was 2.0 (expected progression 7.0), in group B, the SHS progression was 1.0 (expected progression 4.4).Conclusions:In patients with recent-onset rheumatoid arthritis receiving traditional treatment, systematic DAS-driven therapy results in significantly better clinical improvement and possibly improves the suppression of joint damage progression.

scholarly journals Rapid improvement in spinal pain in patients with axial spondyloarthritis treated with secukinumab: primary results from a randomized controlled phase-IIIb trial

2021 ◽  
Vol 13 ◽  
pp. 1759720X2110514
Author(s):  
Denis Poddubnyy ◽  
Effie Pournara ◽  
Agnieszka Zielińska ◽  
Asta Baranauskaite ◽  
Alejandro Muñoz Jiménez ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Pain Score ◽  
Axial Spondyloarthritis ◽  
Activity Index ◽  
Spinal Pain ◽  
Rapid Improvement ◽  
Activity Measurements ◽  
Group A ◽  
Group B

Background: This study aimed to evaluate the efficacy and safety of secukinumab 150 mg compared with placebo in the management of spinal pain and disease activity in patients with axial spondyloarthritis (axSpA) at Week 8 and up to Week 24. Methods: Patients ( n = 380) with active axSpA were randomized (3:1) to secukinumab 150 mg (Group A) or placebo (Group B). At Week 8, patients from Group A with an average spinal pain score <4 were defined as responders and were re-assigned to secukinumab 150 mg (Arm A1); whereas non-responders were re-randomized to secukinumab 150/300 mg (Arm A2/A3). Patients from Group B were re-randomized (1:1) to secukinumab 150/300 mg (Arm B1/B2). Results: At Week 8, the odds of achieving an average spinal pain score of <4 were significantly higher for patients on secukinumab 150 mg than for patients on placebo (odds ratio (OR): 1.89; 95% confidence interval (CI): 1.08–3.33; p = 0.0264). Further reductions in spinal pain were observed across treatment groups up to Week 24. Pronounced improvements were also observed in other disease activity measurements, such as Bath Ankylosing Spondylitis Disease Activity Index and Ankylosing Spondylitis Disease Activity Score. Responders from Group A showed the highest improvements for all measured parameters of spinal pain compared with the other arms. No new or unexpected safety signals were observed. Conclusion: Secukinumab provided rapid and significant improvement in spinal pain at Week 8 which was sustained or increased further up to Week 24 in patients with axSpA. Trial Registration: ClinicalTrials.gov: NCT03136861. Registered May 2, 2017.

Development of an ASAS-endorsed disease activity score (ASDAS) in patients with ankylosing spondylitis

2008 ◽  
Vol 68 (1) ◽  
pp. 18-24 ◽  
Author(s):  
C Lukas ◽  
R Landewé ◽  
J Sieper ◽  
M Dougados ◽  
J Davis ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Global Assessment ◽  
Disease Activity Score ◽  
Activity Index ◽  
Function Analysis ◽  
International Study ◽  
Patient Global Assessment ◽  
Activity Score ◽  
Pain Patient

Objectives:To develop a new index for disease activity in ankylosing spondylitis (ASDAS) that is truthful, discriminative and feasible, and includes domains/items that are considered relevant by patients and doctors.Methods:Eleven candidate variables covering six domains of disease activity, selected by ASAS experts in a Delphi exercise, were tested in a three-step approach, similar to the methodology used for the disease activity score in rheumatoid arthritis. Data on 708 patients included in ISSAS (International Study on Starting tumour necrosis factor blocking agents in Ankylosing Spondylitis) were used. Cross validation was carried out in the OASIS cohort (Outcome in Ankylosing Spondylitis International Study).Results:Principal component analysis disclosed three factors with eigenvalues >0.75: patient assessments, peripheral joint assessments and acute phase reactants. Discriminant function analysis resulted in a correct classification in ∼72% of the cases (prior probability ∼50%). Regression analysis resulted in an index with five variables (total back pain, patient global assessment, duration of morning stiffness, C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR)). Three additional candidate indices were designed using similar methodology while omitting either ESR or CRP or patient global assessment. All four scores correlated with the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI; r = 0.67–0.80), patient (0.58–0.75) and physician’s global assessment (0.41–0.48) of disease activity. All four candidate ASDAS indices performed better than BASDAI or single-item variables in discriminating between high and low disease activity state, according to doctors as well as patients in the OASIS cohort.Conclusion:The first steps in the development of a new assessment tool of disease activity in AS derived four candidate indices with good face and construct validity, and high discriminant capacity.

scholarly journals Cross-cultural adaptation and validation of Lithuanian questionnaires for the spondyloarthropathies

Medicina ◽  
2009 ◽  
Vol 45 (3) ◽  
pp. 177
Author(s):  
Lina Vencevičienė ◽  
Rita Rugienė ◽  
Algirdas Venalis ◽  
Irena Butrimienė
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Cultural Adaptation ◽  
Activity Index ◽  
Intraclass Correlation ◽  
Disease Activity Index ◽  
Global Score ◽  
Functional Index

Original English questionnaires – Bath Ankylosing Spondylitis Functional Index, Bath Ankylosing Spondylitis Patient Global Score, and Bath Ankylosing Spondylitis Disease Activity Index – are designed to evaluate health, physical and psychical state of patients with spondyloarthropathies and to assess efficiency of the treatment. Objective. The objective of the study was to adapt Bath Ankylosing Spondylitis Functional Index, Bath Ankylosing Spondylitis Patient Global Score, Bath Ankylosing Spondylitis Disease Activity Index questionnaires to the Lithuanian context and examine their psychometric aspects: reliability and validity. Patients and methods. Validation and linguistic and cultural adaptation of Lithuanian questionnaires were performed according to the requirements for adaptation of the international questionnaires. Psychometric features of Lithuanian questionnaires were examined in 139 patients with spondyloarthropathies. The validity of questionnaires was tested by comparing these questionnaires with Health Assessment Questionnaire Modified for Spondyloarthropathies, metrology indices (tragus-to-wall distance, lateral flexion, modified Schober’s distance, intermalleolar distance), pain intensity, patient’s well-being, physician’s assessment of the disease activity, and total enthesis count. The reliability of questionnaires was assessed by determining internal consistency of scales and scale stability and by calculating the intraclass correlation coefficient. Results. The linguistic and cultural adaptation of these questionnaires was made during the study. Internal consistency was high for functional and disease activity index (Cronbach a³0.80) and moderate for the Bath Ankylosing Spondylitis Patient Global Score (Cronbach a=0.58). High stability in regard to time was characteristic of all three questionnaires (intraclass correlation coefficient >0.95). A significant association between the separate questions of examined instruments, their joint results and other factors reflecting patient’s health was established. Conclusions. Bath Ankylosing Spondylitis Functional Index, Bath Ankylosing Spondylitis Patient Global Score, and Bath Ankylosing Spondylitis Disease Activity Index questionnaires in Lithuanian fully correspond to psychometric requirements. They are appropriate and relevant in assessing the influence of spondyloarthropathies on a patient’s health.

scholarly journals OP0008 DEVELOPMENT AND VALIDATION OF AN ALTERNATIVE ANKYLOSING SPONDYLITIS DISEASE ACTIVITY SCORE WHEN PATIENT GLOBAL ASSESSMENT IS UNAVAILABLE

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 6-6
Author(s):  
A. Ortolan ◽  
S. Ramiro ◽  
F. A. Van Gaalen ◽  
T. K. Kvien ◽  
R. B. M. Landewé ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Psychometric Properties ◽  
Global Assessment ◽  
Disease Activity Score ◽  
Validation Cohort ◽  
Patient Global Assessment ◽  
Activity Score ◽  
Research Support ◽  
Low Disease Activity

Background:Ankylosing Spondylitis Disease Activity Score (ASDAS) is a composite index measuring disease activity in axial spondyloarthritis (axSpA). It includes questions from the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Patient Global Assessment (PGA), and inflammation biomarkers. However, ASDAS calculation is not always possible because PGA is sometimes not collected.Objectives:To develop an alternative ASDAS to be used in research settings when PGA is unavailable.Methods:Longitudinal data from 4 axSpA cohorts and 2 RCTs were combined. Observations were randomly split in a development (N=1026) and a validation cohort (N=1059). Substitutes of PGA by BASDAI total score, single or combined individual BASDAI questions, and a constant value, were considered. In the development cohort, conversion factors for each substitute were defined by Generalized Estimating Equations. Validation was performed in the validation cohort according to the OMERACT filter, taking into consideration: 1) Truth (agreement with original-ASDAS in the continuous score, by intraclass correlation coefficient -ICC- and in disease activity states, by weighted kappa) 2) Discrimination (standardized mean difference –SMD- of ASDAS scores between high/low disease activity states defined by external anchors e.g Patient Acceptable Symptom State –PASS-; agreement -kappa- in the % of patients reaching ASDAS improvement criteria according to alternative vs. original formulae) 3) Feasibility.Results:Taking all psychometric properties into account and comparing the different formulae (Table), alternative-ASDAS using BASDAI total as PGA replacement proved to be: 1) truthful (agreement with original-ASDAS: ICC=0.98, kappa=0.90); 2) discriminative: it could discriminate between high/low disease activity states (e.g. scores between PASS no/yes: SMD=1.37 versus original-ASDAS SMD=1.43) and was sensitive to change (agreement with original-ASDAS in major improvement/clinically important improvement criteria: kappa=0.93/0.88; 3) feasible (BASDAI total often available; conversion coefficient≈1).Table.Psychometric properties of alternative ASDAS formulaeConclusion:Alternative-ASDAS using BASDAI total score as PGA replacement is the most truthful, discriminative and feasible instrument. This index enables ASDAS calculation in existing cohorts without PGA.Disclosure of Interests:Augusta Ortolan: None declared, Sofia Ramiro: None declared, Floris A. van Gaalen: None declared, Tore K. Kvien Grant/research support from: Received grants from Abbvie, Hospira/Pfizer, MSD and Roche (not relevant for this abstract)., Consultant of: Have received personal fees from Abbvie, Biogen, BMS, Celltrion, Eli Lily, Hospira/Pfizer, MSD, Novartis, Orion Pharma, Roche, Sandoz, UCB, Sanofi and Mylan (not relevant for this abstract)., Paid instructor for: Have received personal fees from Abbvie, Biogen, BMS, Celltrion, Eli Lily, Hospira/Pfizer, MSD, Novartis, Orion Pharma, Roche, Sandoz, UCB, Sanofi and Mylan (not relevant for this abstract)., Speakers bureau: Have received personal fees from Abbvie, Biogen, BMS, Celltrion, Eli Lily, Hospira/Pfizer, MSD, Novartis, Orion Pharma, Roche, Sandoz, UCB, Sanofi and Mylan (not relevant for this abstract)., Robert B.M. Landewé Consultant of: AbbVie; AstraZeneca; Bristol-Myers Squibb; Eli Lilly & Co.; Galapagos NV; Novartis; Pfizer; UCB Pharma, Pedro M Machado Consultant of: PMM: Abbvie, Celgene, Janssen, Lilly, MSD, Novartis, Pfizer, Roche and UCB, Speakers bureau: PMM: Abbvie, BMS, Lilly, MSD, Novartis, Pfizer, Roche and UCB, Adeline Ruyssen-Witrand Grant/research support from: Abbvie, Pfizer, Consultant of: Abbvie, BMS, Lilly, Mylan, Novartis, Pfizer, Sandoz, Sanofi-Genzyme, Astrid van Tubergen Consultant of: Novartis, Caroline Bastiaenen: None declared, Désirée van der Heijde Consultant of: AbbVie, Amgen, Astellas, AstraZeneca, BMS, Boehringer Ingelheim, Celgene, Cyxone, Daiichi, Eisai, Eli-Lilly, Galapagos, Gilead Sciences, Inc., Glaxo-Smith-Kline, Janssen, Merck, Novartis, Pfizer, Regeneron, Roche, Sanofi, Takeda, UCB Pharma; Director of Imaging Rheumatology BV

scholarly journals POS0241 VALIDATION OF THE ANKYLOSING SPONDYLITIS DISEASE ACTIVITY SCORE WITH A QUICK QUANTITATIVE C-REACTIVE PROTEIN ASSAY (ASDAS-QCRP) IN PATIENTS WITH AXIAL SPONDYLOARTHRITIS (AXSPA): A PROSPECTIVE, NATIONAL, MULTICENTER STUDY

2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 342.1-342
Author(s):  
F. Proft ◽  
J. Schally ◽  
H. C. Brandt ◽  
J. Brandt-Juergens ◽  
G. R. Burmester ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Disease Activity Score ◽  
High Disease Activity ◽  
Activity Score ◽  
Inactive Disease ◽  
Treat To Target ◽  
C Reactive Protein ◽  
Low Disease Activity ◽  
Reactive Protein

Background:According to international recommendations, the Ankylosing Spondylitis Disease Activity Score (ASDAS) is the preferred score for assessing disease activity in axial spondyloarthritis (axSpA) [1]. However, routine determination of C-reactive protein (CRP) to calculate ASDAS values takes hours to days. This limits the use of ASDAS in clinical routine and clinical trials and hinders the implementation of treat-to-target approaches in axSpA. Whereas quick quantitative CRP (qCRP) tests allow CRP assessment within a few minutes. In a pilot project the performance of qCRP-based ASDAS assessment (ASDAS-qCRP) was already investigated in a single center study of 50 newly diagnosed, bDMARD-naïve axSpA patients with promising results [2].Objectives:To validate the ASDAS-qCRP in a prospective, multicenter study of axSpA patients in a typical axSpA cohort with an appropriate sample size.Methods:The study was conducted in five centers in Germany. Consecutive adult (≥ 18 years) axSpA patients were included. In addition to a rheumatological assessment, including patient reported outcomes (PROs), routine CRP and erythrocyte sedimentation rate (ESR) were measured in the local labs. Additionally, a qCRP testing with the „QuikRead go instrument“ (Aidian Oy, Finland) was performed at the study center (measurement range 0.5 - 200 mg/l for hematocrit concentrations of 40 – 45%). Statistical analysis included descriptive statistics, cross tabulation and weighted Cohen´s kappa comparing disease activity categories, Bland-Altman plots and intraclass correlation coefficient (ICC) for ASDAS-CRP and ASDAS-qCRP.Results:In this study 251 axSpA patients were included between January and September 2020 (mean age: 38.4 years; mean disease duration: 6.2 years, 159 patients (63.3%) were male, 211 (84.1%) HLA-B27 positive and 195 (77.7%) were classified as radiographic axSpA). 143 patients (57.0%) were treated with bDMARDs. CRP and qCRP showed mean values of 2.12 and 2.17 mg/l, respectively. With the ASDAS-qCRP, 242 patients (96.4%) were assigned to the same disease activity category as compared to the ASDAS based on the conventional lab CRP measurement (Table 1). Weighted Cohen´s kappa was 0.966 (95%CI: 0.943; 0.988). ICC for ASDAS-CRP- and ASDAS-qCRP-values was 0.997 (95%CI: 0.994; 0.999). The agreement of ASDAS-qCRP and ASDAS-CRP is shown in a Bland-Altman plot (Figure 1).Table 1.Disease activity categories by ASDAS-qCRP vs. ASDAS-CRPASDAS-qCRP (n = 251)Inactive Disease(< 1.3)Low Disease Activity (1.3 - < 2.1)High Disease Activity (2.1 - 3.5)Very high Disease Activity (> 3.5)ASDAS-CRPInactive Disease(< 1.3)56 (22.3%)2 (0.8%)Low Disease Activity (1.3 - < 2.1)62 (24.7%)7 (2.8%)High Disease Activity (2.1 - 3.5)97 (38.6%)Very high Disease Activity (> 3.5)27 (10.8%)The fields highlighted in red indicate that disease activity categories do not match.ASDAS = Ankylosing Spondylitis Disease Activity Score, CRP = C-reactive protein, qCRP = quick quantitative CRPConclusion:The ASDAS-qCRP and ASDAS-CRP showed an almost perfect agreement on the assignment to disease activity categories (96%) with the important advantage of time. With ASDAS-qCRP, rheumatologists could base their clinical decision-making on a disease activity measurement by using a composite score immediately. ASDAS-qCRP, therefore, can be integrated in clinical routine and clinical trials in the future and may facilitate implementation of the treat-to-target concept in axial SpA.References:[1]Smolen JS, et al. Ann Rheum Dis. 2018 Jan; 77(1):3-17.[2]Proft F, et al. Joint Bone Spine. 2019 Jul 29.Figure 1.Bland-Altman plot for ASDAS-qCRP and ASDAS-CRPAcknowledgements:The authors would like to deeply thank Braun T, Doerwald C, Deter N, Höppner C, Lackinger J, Lorenz C, Lunkwitz K, Mandt B, Sron S and Zernicke J for their practical support and coordinating the study.Funding statement: The AQUA study was supported by an unrestricted research grant from Novartis. Testing kits were provided free of charge from Aidian Oy, Finland.Disclosure of Interests:None declared

Sign in / Sign up

Export Citation Format

Share Document