Ying , Yubing, Siriyaporn Khunthason, and Kessarawan Nilvarangkul. 2023. “Factors Associated with Severity of Dyspnea in Patients with Chronic Obstructive Pulmonary Disease in Zhejiang Province, China: A Cross-sectional Study”. Journal of Health Science and Alternative Medicine 5 (01). Bangkok, Thailand:6-15. https://doi.org/10.14456/jhsam.2023.2.