The voluntary and informed consent of subjects has been the central focus of concern in research reviews, overshadowing the importance of all other considerations. The Nuremberg Code, with its rights-based protection of the subject's autonomy above all else, made it difficult to justify research with no intended benefit when subjects are incompetent to make a valid informed choice to participate. Subsequent codes providing for research with incompetent subjects followed the lead of Nuremberg, substituting the informed authorization of a proxy for the informed consent of the subject.