21. CHARACTERISTICS AND TREATMENT RESPONSE OF OUTPATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE MANAGED AT NATIONAL LUNG HOSPITAL FROM 2021 TO 2022. (2024). Vietnam Journal of Community Medicine, 65(CĐ 3 - Bệnh viện Phổi Trung ương). https://doi.org/10.52163/yhc.v65iCD3.1117