1. The Division of Cardiology, Department of Medicine, Cedars-Sinai Medical Center, and UCLA, LosAngeles, CA
2. Guidant Corp, St Paul, Minn
3. Department of Neurology, Childrens Hospital and University of Southern California, Los Angeles, CA
4. The Division of Cardiology, Department of Medicine, Cedars-Sinai Medical Center, and UCLA, LosAngeles, CA; Room 5342, CSMC, 8700 Beverly Blvd, Los Angeles, CA 90048-1865