1. From the Massachusetts General Hospital, Boston (L.H.S., E.E.S.); UCLA Medical Center, Los Angeles, Calif (G.C.F.); Michigan State University, East Lansing (M.J.R.); Duke Clinical Research Institute, Durham, NC (W.P., L.L., E.P.); Emory University, Atlanta, Ga (M.R.F.); Berkshire Medical Center, Pittsfield, Mass (G.E.); Brigham and Women’s Hospital, Boston, Mass (C.P.C.); and Masspro, Waltham, Mass (K.A.L.).