1. Orlando Immunology Center, Orlando, Florida.
2. Department für Gastroenterologie mit Infektiologie, LKH Graz South-West, Graz, Austria.
3. Department of Infectious Diseases, NewYork-Presbyterian Queens, Flushing, New York.
4. Midway Immunology Center, Ft. Pierce, Florida.
5. Southern California Men's Medical Group, Los Angeles, California.
6. Gilead Sciences, Inc., Foster City, California.