Upper gastrointestinal bleeding caused by simultaneous dieulafoy's lesion and pre-pyloric peptic ulceration - GÜRER, Ahmet; ÖZDOĞAN, Mehmet; ÖZLEM, Nuraydın; ÖZTÜRK, Vedat; GÖMCELİ, İsmail; SELVİ, Eyüp; AYDIN, Raci (Turkish Journal of Gastroenterology, 2005)