Siregar, S. R. A., J. H. Siregar, M. E. Lubis, and Z. Anshari. “Analysis Body Mass Index in COPD Patients at Pirngadi Regional General Hospital Medan”. International Journal of Public Health Excellence (IJPHE), vol. 4, no. 2, Feb. 2025, pp. 448-52, doi:10.55299/ijphe.v4i2.1287.