Varughese, Jilu Daniel, and Jayakumari S. “A PROSPECTIVE OBSERVATIONAL STUDY ON HEALTH-RELATED QUALITY OF LIFE IN CHRONIC OBSTRUCTIVE PULMONARY DISEASE PATIENTS BASED ON SEVERITY”. Asian Journal of Pharmaceutical and Clinical Research 10, no. 8 (August 1, 2017): 244–247. Accessed April 27, 2024. https://journals.innovareacademics.in/index.php/ajpcr/article/view/19199.