THE CLINICAL, PARACLINICAL CHARACTERISTICS AND QUALITY OF LIFE OF PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) AT FRIENDSHIP HOSPITAL. YHCĐ [Internet]. 2026 June 25 [cited 2026 Sept. 9];67(6). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/5449