Sitepu R, Rizki KS, Yasli DZ, Simanullang A, Manurung FJ. Improved knowledge of COPD management through a health education intervention: A study at Vina Estetica Hospital, Medan. BKKP [Internet]. 2026 Feb. 19 [cited 2026 Apr. 2];5(1):57-61. Available from: http://139.162.50.187/index.php/bulkesprima/article/view/8063