From University at Albany, State University of New York (E.L.H., C.W.), Albany, NY; Columbia-Presbyterian Medical Center (C.R.S.), New York, NY; Rush University Medical Center (R.S.D.H.), Chicago, Ill; Mercy Hospital (R.E.C.), Buffalo, NY; New York University Medical Center (A.T.C.), New York, NY; Medical University of Ohio (J.P.G.), Toledo, Ohio; and Duke University Medical Center (R.H.J.), Durham, NC. (At 2007-09-04)