Helicobacter pylori: corrections and comments.
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D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D016481:Helicobacter Infections / Q000150:complications*; D016480:Helicobacter pylori; D006801:Humans; D010437:Peptic Ulcer / Q000188:drug therapy* / Q000821:virology*; D012107:Research Design