title: Clinical trials in ulcerative colitis: II. Historical review.
mesh_terms: D000897:Anti-Ulcer Agents / Q000266:history / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D003093:Colitis, Ulcerative / Q000188:drug therapy* / Q000266:history; D049673:History, 20th Century; D006801:Humans; D012460:Sulfasalazine / Q000266:history / Q000627:therapeutic use*
chemical_list: D000897:Anti-Ulcer Agents; D012460:Sulfasalazine