Hồi, Trần Thị Bích, Phạm Trung Kiên, Vũ Thị Hoa, Nguyễn Thị Thu Trang, and Nguyễn Thế Anh. “Some Epidemiological, Clinical and Subclinical Characteristics With Chronic Obstructive Pulmonary Disease (COPD) at Hai Phong Lung Hospital in 2021”. Vietnam Journal of Preventive Medicine 33, no. 1 Phụ bản (June 5, 2023): 14. Accessed May 17, 2024. https://vjpm.vn/index.php/vjpm/article/view/981.