1. Centro Nacional de Referencia para el SIDA, Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Paraguay 2155, Piso 11, C1121ABG, Buenos Aires, Argentina
2. Division Neumotisiologia, Hospital General de Agudos Dr Enrique Tornu, Donato Alvarez 3002, 1406 Buenos Aires, Argentina
3. US Military HIV Research Program at the Walter Reed Army Institute of Research, 1 Taft Court, Suite 250, Rockville, MD 20850, USA
4. Department of Epidemiology, Institute of Human Virology, University of Maryland Biotechnology Institute, 725 W. Lombard Street, Baltimore, MD 21201, USA
5. US Naval Medical Research Center Detachment (NMRCD), Unit 3800, APO-AA 34031-3800 Lima, Peru
6. Tisioneumonologia, Hospital Gral. de Agudos Carlos C. Durand, Av. Díaz Vélez 5044, 1405, Buenos Aires, Argentina
7. Servicio de Medicina Preventiva, Hospital Gral. Bernardino Rivadavia, Gral. Las Heras 2670, 1425, Buenos Aires, Argentina
8. Laboratory, Microbiology Unit, Hospital General de Agudos Dr. Enrique Tornu, Donato Alvarez 3002, 1406, Buenos Aires, Argentina
9. CONICET, Argentina
10. Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD 20852, USA
11. Department of Defense Global Emerging Infections Surveillance and Response System (DoD-GEIS), Walter Reed Army Institute of Research, 2900 Linden Lane, Suite 103, Silver Spring, MD 20910, USA