Ali, N., Ullah, A., Akhtar, sohail, Shah, S.W.A. and Junaid, M. 2013. FACTORS ASSOCIATED WITH PEPTIC ULCER: A SINGLE CENTRE EXPERIENCE AT TERTIARY CARE HOSPITAL OF KHYBER PAKHTUNKHWA. KHYBER MEDICAL UNIVERSITY JOURNAL. 5, 1 (Mar. 2013), 18–21.