Elfi, Eka Fithra, Eva Decroli, Ellyza Nasrul, Yanwirasti Yanwirasti, and Eryati Darwin. 2021. “The Risk Factors of Coronary Heart Disease and Its Relationship With Endothelial Nitric Oxide Synthase”. Open Access Macedonian Journal of Medical Sciences 9 (B):451-56. https://doi.org/10.3889/oamjms.2021.6062.