1. Wake Forest University Health Sciences, Winston-Salem, North Carolina.
2. Chelsea and Westminster NHS Foundation Trust and PKR/SSR, London, United Kingdom.
3. Clinical Research Puerto Rico, Inc., San Juan, Puerto Rico.
4. Universidad Nacional de Rosario, Santa Fe, Argentina.
5. Hospital Carlos Mac Gregor IMSS, Mexico City, Mexico.
6. Instituto de Pesquisa Clínica Evandro Chagas-Fiocruz, Rio de Janeiro, Brazil.
7. HIV-NAT, Thai Red Cross AIDS Research Centre and Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
8. Tibotec BVBA, Beerse, Belgium.
9. Tibotec Inc., Titusville, New Jersey.