1. Department of Bioethics and Humanities, University of Washington, Seattle, Washington (W.B.)
2. The Hastings Center, Garrison, New York (E.P.)
3. Departments of Pediatrics and Medicine, Columbia University Irving Medical Center, New York, New York (W.K.C.)
4. Department of Pediatrics, Columbia University Irving Medical Center, New York, New York (S.M.B.)
5. Department of Psychiatry, Columbia University Irving Medical Center, New York, New York (P.S.A.).