1. Harvard Medical School and Massachusetts General Hospital, Boston, and McLean Hospital, Belmont, Massachusetts (E.L.R.)
2. Center for Clinical Management Research, VA Ann Arbor Healthcare System, and University of Michigan Medical School, Ann Arbor, Michigan (S.V.)
3. University of Michigan Medical School, Ann Arbor, Michigan (E.M.M.)
4. University of Michigan Medical School and the Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, Michigan (M.V.)
5. University of Michigan Medical School, Center for Clinical Management Research, VA Ann Arbor Healthcare System, University of Michigan School of Public Health, and the Institute for Social Research, University of Michigan, Ann Arbor, Michigan (K.Z.)