1. Hôpital Saint Louis, AP-HP, and University of Paris 7, Paris, France.
2. Abbott Laboratories, Abbott Park, Illinois 60064.
3. Royal Free Center for HIV Medicine, London, United Kingdom.
4. Wake Forest University School of Medicine, Winston-Salem, North Carolina 27109.
5. Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
6. Phoenix Body Positive, Phoenix, Arizona 85006.