Khan, P. M., Khan, S. and Hayat, Z. (2011) “Endoscopic Interpretation of Symptomatology of Patients with Upper Gastro-intestinal Problems: A Review of 1390 Cases”, Journal of Postgraduate Medical Institute, 6(1). Available at: https://www.jpmi.org.pk/index.php/jpmi/article/view/416 (Accessed: 7 May 2024).