1. Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts (R.K.W., B.E.L., C.S., R.W.Y.)
2. Washington University School of Medicine, St. Louis, Missouri (K.E.J.)
3. Yale–New Haven Hospital, New Haven, Connecticut (N.R.D.)
4. Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts (M.V.M.)
5. Dartmouth Medical School, Lebanon, New Hampshire (L.G.G.)