Sajid, Muhammad Usman, Farrukh Saeed, and Hafiz Muhammad Ashraf. 2008. “THE DIAGNOSTIC YIELD OF UPPER GASTROINTESTINAL ENDOSCOPY IN PATIENTS WITH IRON DEFICIENCY ANAEMIA: Upper Gastrointestinal Endoscopy”. Pakistan Armed Forces Medical Journal 58 (4):392-96. https://pafmj.org/PAFMJ/article/view/1917.