Elfi, E.F., Decroli, E., Nasrul, E., Yanwirasti, Y. and Darwin, E. 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 (Jun. 2021), 451–456. DOI:https://doi.org/10.3889/oamjms.2021.6062.