Is informed consent always necessary for randomized, controlled trials?
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D000574:American Medical Association / Q000458:organization & administration; D004992:Ethics, Medical; D006805:Human Experimentation; D006801:Humans; D007258:Informed Consent; D016134:Organizational Policy; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D013812:Therapeutics; D014481:United States