Khanam RA, Haque MA, Rahman SMS, Hossain MA, Hassan MR. A Controlled Trial of Noninvasive Positive Pressure Ventilation (NIPPV) in Patients of COPD with Respiratory Failure. Bangladesh Crit Care J [Internet]. 2013 Dec. 1 [cited 2024 Aug. 16];1(2):86-92. Available from: https://banglajol.info/index.php/BCCJ/article/view/17201