PARLAK, Erkan, Ahmet TEZEL, Aysel ÜLKER, Ülkü DAĞLI, Canan ALKIM, and Ali TÜREYEN. 2000. “Ulcerative Colitis in the Elderly in Turkey”. Turkish Journal of Gastroenterology 11 (1):45-48. https://turkjgastroenterol.org/index.php/tjg/article/view/1043.