1 From the Department of Behavioral and Community Health Sciences (S.M.A.), University of Pittsburgh, PA; and Department of Bioethics (S.K.), Clinical Center, NIH, Bethesda, MD. smalbert@pitt.edu.
2 From the Department of Behavioral and Community Health Sciences (S.M.A.), University of Pittsburgh, PA; and Department of Bioethics (S.K.), Clinical Center, NIH, Bethesda, MD.