1. From the University of British Columbia (R.R.S., N.B., M.K., M.R.H.), Vancouver, Canada; University Hospital Eppendorf (B.S., M.B., M.M., J.H., F.R.), Hamburg, Germany; Wake Forest University (J.M.T., J.S.P.), Winston-Salem, NC; and Columbia University (R.R.), New York, NY.