Aijaz Zeeshan Khan Chachar, Khushbakht Tanveer, Sana Arshad, Humaira Nazir, Mohamed Abdullahi Adam, Mohsin Asif. “Frequency of Diabetic Retinopathy in Already Diagnosed Cases of Diabetes Mellitus- A Single Center Experience”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 08, Sept. 2022, p. 146, doi:10.53350/pjmhs22168146.