Postoperative nausea and vomiting--the importance of power.
Yentis
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D018849:Controlled Clinical Trials as Topic; D006801:Humans; D009325:Nausea / Q000188:drug therapy*; D011183:Postoperative Complications / Q000188:drug therapy*; D018401:Sample Size; D014839:Vomiting / Q000188:drug therapy*