J. .- u-. Din, M. B. Qureshi, A. J. Khan, M. D. Khan, and K. Ahmad, “PREVALENCE OF DIABETIC RETINOPATHY AMONG INDIVIDUALS SCREENED POSITIVE FOR DIABETES IN FIVE COMMUNITY-BASED EYE CAMPS IN NORTHERN KARACHI, PAKISTAN”, J Ayub Med Coll Abbottabad, vol. 18, no. 3, Sep. 2006.