1. The therapeutic efficacy of 6-mercaptopurine in refractory ulcerative colitis;Adler;Am J Gastroenterol,1990
2. Colonoscopy during an attack of severe ulcerative colitis is a safe procedure and of great value in clinical decision making;Alemayehu;Am J Gastroenterol,1991
3. Azathioprine in steroid-resistant and steroid-dependent ulcerative colitis;Ardizonne;J Clin Gastroenterol,1997
4. Crohn's disease: A clinical study of 75 patients;Arvanitakis;Am J Gastroenterol,1973
5. Restorative proctocolectomy and indeterminate colitis;Atkinson;Am J Surg,1994