1. George Washington University, Washington, DC (J.S.R., C.F.L., K.C., S.C., S.R., M.T., A.M.R.); Vancouver (BC) General Hospital (A.F.); Mother Francis Hospital, Tyler, Tex (N.I.); Mt Clemens (Mich) General Hospital (J.K.); St Vincents Hospital, Jacksonville, Fla (G.P.); University Community Hospital, Tampa, Fla (J.S.); and University Hospital Gasthuisberg, Leuven, Belgium (F. Van de W.).