KHAN, Farzana; USMAN, Robina; ZAFAR, Shafaq; WADUD, Shamaila. VITAMIN D DEFICIENCY IN PATIENTS WITH DIABETIC RETINOPATHY. Journal of Postgraduate Medical Institute, [S. l.], v. 31, n. 2, 2017. Disponível em: http://www.jpmi.org.pk/index.php/jpmi/article/view/2022. Acesso em: 5 dec. 2025.