Khan, Farzana, Robina Usman, Shaaila Wadud, Shafaq Zafar, and Zain Abideen. “ASSOCIATION OF VITAMIN D WITH RETINOPATHY IN PATIENTS WITH TYPE 2 DIABETES MELLITUS”. Journal Of Medical Sciences 23, no. 2 (June 18, 2015): 58-61. Accessed October 24, 2020. https://jmedsci.com/index.php/Jmedsci/article/view/216.