1. A controlled trial of azathioprine in the management of chronic ulcerative colitis;Rosenberg, J.L.; Wall, A.J.; Levin, B.; Binder, H.J.; Kirsner, J.B.;Gastroenterology,1975
2. Azathioprine in ulcerative colitis: final report on controlled therapeutic trial;Jewell, D.P.; Truelove, S.C.;Br MedJ7,1974
3. Comparison of oral prednisolone given as single or multiple daily doses for active proctocolitis;Powell-Tuck, J.; Bown, R.; Lennard-Jones, J.E.,1978
4. A controlled trial of azathioprine in Crohn's disease;Rosenberg, J.L.; Levin, B.; Wall, A.J.; Kirsner, J.B.;Digestive Diseases,1975
5. National Co-operative Crohn's Disease Study: adverse reactions to study drugs;Gastroenterology,1979