Jeffry, Erick Persson. “COMBINATION THERAPY AS INITIAL TREATMENT FOR HYPERTENSION: A SYSTEMATIC REVIEW”. Journal of Advanced Research in Medical and Health Science (ISSN 2208-2425), vol. 9, no. 2, Feb. 2023, pp. 101-6, https://jarmhs.com/MHS/index.php/mhs/article/view/134.