Muhammad Farhan Lodhi, Jawad Bin Yamin Butt, Muhammad Talha Qamar, Kashif Hanif, Arsalan Shahid, Kainat Javaid, Sardar Awais Tahir Khan, and Iqra Shahzad. “Association of Vitamin D Deficiency in Proliferative Diabetic Retinopathy (PDR)”. International Journal of Pharmacy Research & Technology (IJPRT), vol. 16, no. 1, June 2026, pp. 4519-23, https://ijprt.org/index.php/pub/article/view/2257.