[1] Cleveland Clin Fdn, Dept Cardiol, Cleveland, OH 44195 USA
[2] Univ Alberta, Edmonton, AB T6G 2M7, Canada
[3] Hosp Clin Barcelona, Barcelona, Spain
[4] LeBauer Cardiovasc Res, Greensboro, NC USA
[5] Univ Penn, Med Ctr, Philadelphia, PA 19104 USA
[6] CHU Pitie Salpetriere, Paris, France
[7] Herz Zentrum, Bad Krozingen, Germany
[8] Centocor Inc, Malvern, PA 19355 USA