Hakan Güzel; Şahin Kahramanca; Duray Şeker; Gülay Özgehan; Gündüz Tunç; Tevfik Küçükpınar; Hülagü Kargıcı. Peptic Ulcer Complications Requiring Surgery: What Has Changed in the Last 50 Years in Turkey. Turkish Journal of Gastroenterology 2019, 25, 152-155.