1. Center for Bioethics, Harvard Medical School, Boston, MA (A.C.S.).
2. University of Minnesota-Twin Cities (A.C.S., M.M.), Minneapolis.
3. University of Chicago Aeromedical Network (T.C., I.J.B.), University of Chicago, IL.
4. Department of Pediatrics, University of Utah School of Medicine, Salt Lake City (N.C.M.).
5. Department of Emergency Medicine (I.J.B.)., University of Chicago, IL.
6. Department of Emergency Medicine, Children’s Minnesota (M.M.), Minneapolis.