1 Department of Epidemiology, Infectious Diseases and Microbiology, University of Pittsburgh Graduate School of Public Health, Pennsylvania.
2 Department of Epidemiology and International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
3 Faculty of Medicine and Health Sciences, Department of Medicine and Centre for Infectious Diseases, Stellenbosch University, Cape Town, South Africa.
4 Institute of Human Virology, University of Maryland School of Medicine, Baltimore.
5 International Research Center of Excellence, Institute of Human Virology Nigeria, Abuja.
6 Department of Paediatrics, University of Cape Coast School of Medical Sciences, Ghana.
7 Elizabeth Glaser Pediatric AIDS Foundation, Washington, D.C.
8 Projeto Praça Onze, Universidade Federal do Rio de Janeiro, Brazil.
9 Division of Infectious Diseases, University of Pittsburgh, School of Medicine, Pennyslvania.