[Controlled therapeutic trials: elaboration of the protocol].
D002986:Clinical Trials as Topic / Q000379:methods*; D004381:Duodenal Ulcer / Q000150:complications; D004630:Emergencies; D006801:Humans; D010438:Peptic Ulcer Hemorrhage / Q000601:surgery; D012107:Research Design; D013223:Statistics as Topic; D011795:Surveys and Questionnaires
Essais thérapeutiques contrôles: élaboration du protocole.