Treatment trials and their design.
D002986:Clinical Trials as Topic; D004341:Drug Evaluation / Q000379:methods*; D004381:Duodenal Ulcer / Q000188:drug therapy; D004724:Endoscopy; D006805:Human Experimentation; D006801:Humans; D007258:Informed Consent; D008499:Medical Records; D010349:Patient Compliance; D010352:Patient Dropouts; D011897:Random Allocation; D012107:Research Design; D013223:Statistics as Topic; D013276:Stomach Ulcer / Q000188:drug therapy; D014945:Wound Healing