1. The Scripps Research Institute, La Jolla, CA
2. Harvard Medical School, Boston, MA
3. University of Pennsylvania, Philadelphia, PA
4. Emory University, Atlanta, GA
5. Institute of Human Virology, Baltimore, MD
6. University of Alabama at Birmingham
7. Santa Fe Institute, Santa Fe, NM
8. Rush Medical College, Chicago, IL
9. Case-Western Reserve University, Cleveland, OH
10. The Gladstone Institute for Virology and Immunology, San Francisco, CA
11. Weill Medical College of Cornell University, New York, NY
12. Oregon Health and Science University, Portland, OR
13. University of California, San Diego, and San Diego Veterans Affairs Healthcare System
14. University of Pittsburgh, Pittsburgh, PA
15. University of Massachusetts Medical School, Worcester, MA
16. University of Wisconsin, Madison, WI
17. Northwestern University, Chicago, IL
18. University of California, Los Angeles, CA, USA.