ÖVER, Hülya, Aysel ÜLKER, Çağlar BAYSAL, Ülkü DAĞLI, Ahmet TEZEL, Azmi SERİN, and Leziz ONARAN. 1995. “Natural History of Ulcerative Colitis in Turkey”. Turkish Journal of Gastroenterology 6 (4):463-66. https://www.turkjgastroenterol.org/index.php/tjg/article/view/670.