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*Department of Pediatrics, Boston University School of Medicine, Boston, MA; †Department
of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore,
MD; ‡HIV/AIDS Research Department, Irmandade da Santa Casa de Misericordia de Porto
Alegre, Rio Grande do Sul, Brazil; §Department of Pediatrics, David Geffen UCLA School
of Medicine, Los Angeles, CA; ‖Malawi College of Medicine, Blantyre, Malawi; ¶Infectious
Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janiero, Brazil;
#Department of Pediatrics, School of Medicine, Federal University of Minas Gerais,
Belo Horizonte, Minas Gerais, Brazil; **Serviço de Infectologia, Hospital Nossa Senhora
da Conceicao, Porto Alegre, Rio Grande do Sul, Brazil; ††Division of Clinical Pharmacology,
Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD;
‡‡Gilead Sciences, Foster City, CA; §§Statistical Center for HIV/AIDS Research and
Prevention, Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research
Center, Seattle, WA; ‖‖Department of Pathology, Johns Hopkins University School of
Medicine, Baltimore, MD; ¶¶Family Health International, Durham, NC; ##Makerere University-Johns
Hopkins University Research Collaboration, Kampala, Uganda; ***National Institute
of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD; and
†††Eunice Kennedy Shriver National Institute of Child Health and Human Development,
National Institutes of Health, Rockville, MD.