Michael M. Thomson1, Elena Vázquez de Parga2, Anna Vinogradova3, María Sierra2, A. A. Yakovlev4, Aza Rakhmanova4, Elena Delgado2, Gema Casado2, Mercedes Muñoz2, Rocı́o Carmona2, Yolanda Vega2, Lucía Pérez-Álvarez2, Gerardo Contreras2, Leandro Medrano2, Saladin Osmanov5, Rafael Nájera2
1Centro Nacional de Microbiologia, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
2Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
3St. Petersburg AIDS Center, St. Petersburg, Russia
4Department of Infectious Diseases, Botkins Infectious Diseases Hospital, St. Petersburg, Russia.
5WHO-UNAIDS, Geneva, Switzerland.