From the Brigham and Women’s Hospital (M.A.P., S.C.G., R.J.G., F.S.L., R.T.L., P.M.R., S.D.S., C.H.H.), Boston, Mass; Victoria Hospital (J.M.O.A.), London, Ontario, Canada; Geisinger Medical Center (F.J.M.), Danville, Pa; University of California, San Francisco (E.R.); and Montréal Heart Institute (J.L.R)., Montréal, Québec, Canada. (At 1997-06-17)
