title: Information for drug trial participants.
mesh_terms: D000527:Alprostadil / Q000031:analogs & derivatives / Q000627:therapeutic use; D000897:Anti-Ulcer Agents / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D003718:Denmark; D004346:Drug Information Services / Q000592:standards*; D006801:Humans; D016595:Misoprostol; D011897:Random Allocation; D011899:Ranitidine / Q000627:therapeutic use; D013276:Stomach Ulcer / Q000188:drug therapy
chemical_list: D000897:Anti-Ulcer Agents; D016595:Misoprostol; D011899:Ranitidine; D000527:Alprostadil