Rahman, Md Mostafizur, et al. “Association of Serum Vitamin D Level With Angiographic Severity of Coronary Artery Disease in Patients of Acute Myocardial Infarction”. Cardiovascular Journal, vol. 15, no. 2, Apr. 2023, pp. 124-31, doi:10.3329/cardio.v15i2.65625.