1. Barcelona Centre for International Health Research (CRESIB), Hospital Clínic de Barcelona, University of Barcelona, Barcelona, Spain;
2. Centros de Investigación Biomédica en Red de Epidemiología y Salud Pública, Madrid, Spain;
3. Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique;
4. Division of Infection and Immunity, The Walter and Eliza Hall Institute for Medical Research, Melbourne, Australia;
5. Department of Medical Biology, The University of Melbourne, Melbourne, Australia;
6. Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA; and
7. Papua New Guinea Institute of Medical Research, Madang, Papua New Guinea