1. From the Vancouver Hospital, Cardiovascular Imaging Research Core Laboratory (G.B.J.M.), University of British Columbia, Vancouver, Canada; University of Michigan Medical Center (E.R.B.), Ann Arbor; Vanderbilt University Medical Center (D.J.M.), Nashville, Tenn; Veterans Affairs Cooperative Studies Program Coordinating Center (P.H.), Connecticut VA Healthcare System, West Haven, Conn; Hartford Hospital (M.D.), Hartford, Conn; Montreal Heart Institute (G.G.), University of Montreal, Canada; London...