Arshad, Y., Ayub, H., Akhtar, N. and Usmani, Q. A. (2024) “Risk Factors of Non-Invasive Ventilation Failure in COPD Patients Presenting with Acute Exacerbation”, Pakistan Journal of Medicine and Dentistry, 13(1), pp. 81–87. doi: 10.36283/PJMD13-1/015.