PARLAK, Erkan, Aysel ÜLKER, Ülkü DAĞLI, and Canan ALKIM. 2000. “Is Determination of Initial Attack Severity Predictive for Long-Term Prognosis in Patients With Total Ulcerative Colitis?”. Turkish Journal of Gastroenterology 11 (3):231-34. https://turkjgastroenterol.org/index.php/tjg/article/view/1080.