1. Harvard School of Public Health; Boston MA USA
2. The Channing Laboratory; Harvard Medical School; Boston MA USA
3. TIMI Study Group; Brigham and Women's Hospital; Boston MA USA
4. Harvard Medical School; Boston MA USA
5. University of Massachusetts; Amherst MA USA
6. Dalla Lana School of Public Health; University of Toronto; Toronto ON Canada
7. Mailman School of Public Health; Columbia University; New York NY USA
8. University of Virginia; Charlottesville VA USA