A retrospective study demonstrating properties of nonvariceal upper gastrointestinal bleeding in Turkey - Bor, Serhat; DAĞLI, Ülkü; SARER, Banu; GÜREL, Selim; TÖZÜN, Nurdan; SİVRİ, Bülent; AKBAŞ, Türkay; ŞAHİN, Burhan; MEMİK, Faruk; BATUR, Yücel (Turkish Journal of Gastroenterology, 2011)