Riyapa, S., R. Matanasarawoot, and A. Matanasarawoot. “Factors Associated with Acute Exacerbation Among COPD Patients Leading to Visit Emergency Room of Banhong Hospital, Lamphun Province”. Journal of The Department of Medical Services, vol. 49, no. 3, Sept. 2024, pp. 105-1, https://he02.tci-thaijo.org/index.php/JDMS/article/view/266285.