Without double blind randomization, what can we conclude?
D000535:Aluminum / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D006801:Humans; D011897:Random Allocation; D012008:Recurrence; D012107:Research Design; D013276:Stomach Ulcer / Q000517:prevention & control*; D013392:Sucralfate
D013392:Sucralfate; D000535:Aluminum