Evaluation of Intermittent Long-term Negative-Pressure Ventilation in Patients with Severe Chronic Obstructive Pulmonary Disease
1988 ◽
Vol 138
(6)
◽
pp. 1515-1518
◽
1992 ◽
Vol 146
(3)
◽
pp. 722-729
◽
1991 ◽
Vol 44
(6)
◽
pp. 483-496
◽