Afghani, Tayyab, Nadeem Qureshi, and Khalid Saeed Ahmad Chaudhry. 2007. “SCREENING FOR DIABETIC RETINOPATHY: A COMPARATIVE STUDY BETWEEN HOSPITAL AND COMMUNITY BASED SCREENING AND BETWEEN PAYING AND NON-PAYING PATIENTS”. Journal of Ayub Medical College Abbottabad 19 (1):16-22. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/4283.