1. Stanford University, Stanford, California
2. SWOG Statistical Center, Seattle, Washington
3. Wayne State University, Detroit, Michigan
4. Yale University, New Haven, Connecticut
5. Keck USC School of Medicine, Los Angeles, California
6. University of Michigan, Ann Arbor, Michigan
7. University of Colorado, Aurora, Colorado
8. Columbia University, New York, New York
9. Baylor College of Medicine, Houston, Texas
10. University of Texas Health Science Center, San Antonio, Texas