The course of colonic disease in ulcerative colitis patients with primary sclerosing cholangitis - PARLAK, Erkan; ÜLKER, Aysel; ALKIM, Canan; ÖZDERİN, Yasemin and DİŞİBEYAZ, Selçuk and TUNÇ, Bilge and DAĞLI, Ülkü (Turkish Journal of Gastroenterology, 2002)