1. Bristol Myers Squibb, Lawrenceville, NJ 08648, USA
2. OM1 Inc., Boston, MA 02116, USA
3. Pfizer Inc., New York, NY 10001, USA
4. Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA