“Relation between Preinfarction Angina and Coronary Collateral Circulation in Patients with Acute Myocardial Infarction”, Althea Med J, vol. 3, no. 1, pp. 29–33, Mar. 2016, Accessed: Jul. 22, 2026. Available: https://journal.fk.unpad.ac.id/index.php/amj/article/view/709