Huyen, Hoang, Nguyen Kim Cuong, & Le Thi Luyen.
" Characteristics of Exacerbation and Antibiotic Usage  in Treatment for Exacerbation of COPD Patients  in National Lung Hospital (2022-2023)." <em>VNU Journal of Science: Medical and Pharmaceutical Sciences</em> [Online], 39.4 (2023): n. pag. Web.  5 Dec. 2024