Mohammad Asif, Talha Laique. “Effects of Isotretinoin on Serum Vitamin-D Levels Among Severe Acne Vulgaris Patients”. Pakistan Journal of Medical & Health Sciences 17, no. 12 (April 1, 2024): 38. Accessed December 22, 2024. https://mail.pjmhsonline.com/index.php/pjmhs/article/view/5411.