1. From Equipe d’accueil 2693 (E.J., T.L.T., E.V.B., S.S., C.Z., B.J., D.C.) and 1046 (I.S., R.B.), IFR 114, University of Lille II and Centre Hospitalier Régional Universitaire de Lille, France, and Section of Cardiovascular Medicine, Yale University, New Haven, Conn (M.D.E.).