Sitepu, R., Rizki, K. S., Yasli, D. Z., Simanullang, A., & Manurung, F. J. (2026). Improved knowledge of COPD management through a health education intervention: A study at Vina Estetica Hospital, Medan. Buletin Kedokteran & Kesehatan Prima, 5(1), 57–61. https://doi.org/10.34012/bkkp.v5i1.8063