Orhan SEZGİN, Engin ALTINTAŞ, and Anıl TOMBAK. 2019. “Effects of Seasonal Variations on Acute Upper Gastrointestinal Bleeding and Its Etiology”. Turkish Journal of Gastroenterology 18 (3):172-76. https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/2120.