1. An experiment to determine the active therapeutic moiety of suiphasalazine;AK, Azad Khan; J, Piris; SC, Truelove;Lancet,1977
2. Effect of sulphapyridine, S-aminosalicylic acid and placebo in patients with idiopathic proctitia. A study to determine the active therapeutic moiety of salicylozosulphapyridine;PAM, Van Hees; JH, Bakker; JHM, Van Tongeren,1980
3. Therapeutic efficacy of sulfasalazine and its metabolites in patients with ulcerative colitis and Crohn's disease;Klotz, U.; Maier, K.; Fiacher, C.; Heinkel, K.;N EnglJr Med,1980
4. Metabolism and urinary excretion of 5-aminosalicylic acid in healthy volunteers when given intravenously or released for absorption at different sites in the gastrointestinal tract;Myers, B.; Evans, D.N.W.; Rhodes, J.; Evans, B.K.; Hughes, D.R.; Lee, M.G.;Gut,1987
5. 5-aminosalicylic acid enema in the treatment of distal ulcerative colitis, proctosigmoiditis and proctitis;Sutherland, L.R.; Martin, F.; Greer, S.; Robinson, M.; Greenberger, N.; Saibil, F.;Gastroenterology,1987