Sidra Jabeen, Humaira Fayyaz Khan, Samia Sarwar, Mehvish Ashfaq, Ayesha Zafar, Ummara Aslam, Shmyla Hamid. “Protective Effect of Vitamin-D Supplementation in Patients of Acute Coronary Syndrome During COVID-19 Pandemic”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 03, May 2022, p. 1053, doi:10.53350/pjmhs221631053.