1. Department of Medicine and TIMI Study Group, Brigham & Women’s Hospital, 75 Francis St., Boston, MA 02115
2. Children’s Hospital Medical Center, 300 Longwood Ave., Boston, MA 02115
3. Donald W. Reynolds Cardiovascular Research Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., CS 7.142, Dallas, TX 75390-9047