1. Beth Israel Deaconess Medical Center, Harvard Medical School, Harvard Pilgrim Health Care Institute, and The Fenway Institute, Boston, Massachusetts (D.S.K.)
2. New York City Department of Health and Mental Hygiene, New York, New York (D.C.D.)
3. West Virginia University, Morgantown, West Virginia (J.F.)
4. Harvard Medical School, Harvard Pilgrim Health Care Institute, and The Fenway Institute, Boston, Massachusetts (J.L.M.)