1. Controlled trial of azathioprine in Crohn's disease;Rhodes, J.; Bainton, D.; Beck, P.; Campbell, H.;Lancet,1971
2. Treatment ofCrohn's disease with azathioprine: a controlled evaluation;Klein, M.; Binder, H.J.; Mitchell, M.; Aaronson, R.; Spiro, H.;Gastroenterology,1974
3. The national cooperative Crohn's disease study: results ofdrug treatment;true;Gastroenterology,1979
4. Azathioprine in ulcerative colitis: final report on controlled therapeutic trial;Jewell, D.P.; Truelove, S.C.;BMJ,1974
5. Controlled trial of azathioprine in Crohn's disease;Willoughby, J.M.T.; Kumar, P.J.; Beckett, J.; Dawson, A.M.;Lancet,1971