[The dilemma of the clinical trial: what does it prove?].
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D000328:Adult; D000367:Age Factors; D000368:Aged; D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D012307:Risk Factors
Das Dilemma der klinischen Prüfung: Was prüft sie?