1. From Cardiovascular Engineering, Inc (G.F.M.), Holliston, Mass; State University of New York at Buffalo (J.L.I.), Buffalo, NY; Centre hospitalier de l’Universite Laval (Y.L.), Ste Foy, Quebec; Q&T Research, Inc (J.-P.O.), Sherbrooke, Quebec, Canada; Orange County Research Center (J.N.), Orange, Calif; Bristol-Myers Squibb Pharmaceutical Research Institute (C.Q., L.J.K., A.J.B.), Princeton, NJ; and Brigham and Women’s Hospital (M.A.P.), Boston, Mass.