Hussain, M. M.; Bhuiya, M. H.; Ahmed, F.; Masud, M.; Rahman, A.; Rahman, M.; Kafr, A.- hel; Rahman, M. Upper GI Hemorrhage from Duodenal Ulcer Due to Post-Cholecystectomy Clip Migration. J. Bangladesh Coll. Phys. 2013, 30, 225-228.