1. From the University Health Network (F.L.S.), University of Toronto, Toronto, Ontario, Canada; Ctr Hospier Affilié (A.M.), Hop de l'Enfant-Jésus, Quebec City, Quebec, Canada; Oregon Health and Science University (W.M.C.), Portland, OR; Central Baptist Hospital (W.B.), Lexington, KY; University of Texas Southwestern Medical Center and VA North Texas Care System (C.H.T.), Dallas, TX; The Methodist Hospital (D.C.), Houston, TX; Duke University Medical Center (L.B.G.), Durham, NC; MetroHealth Medical...