1. From the Duke Clinical Research Institute, Durham, NC (L.K.N., E.M.O., R.A.H., V.H., R.M.C.); University of Maryland Medical System, Baltimore (R.H.C.); Cleveland Clinic Foundation, Cleveland, Ohio (D.J.M., E.J.T.); Green Lane Hospital, Auckland, New Zealand (H.D.W.); University of Alberta, Edmonton, Canada (P.W.A.); Catholic University Hospital, Leuven, Belgium (F.V.d.W.); and University Hospital, Basel, Switzerland (M.P.).