1. 1Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia;
2. 2International Vaccine Institute, Seoul, Republic of Korea;
3. 3Swiss Tropical and Public Health Institute, Basel, Switzerland;
4. 4University of Basel, Basel, Switzerland;
5. 5Cambridge Institute of Therapeutic Immunology and Infectious Disease, University of Cambridge School of Clinical Medicine, Cambridge Biomedical Campus, Cambridge, United Kingdom;
6. 6Institut Supeìrieur des Sciences de la Population, University of Ouagadougou, Burkina Faso;
7. 7Faculty of Medicine, University of Gezira, Wad Medani, Sudan;
8. 8University of Antananarivo, Antananarivo, Madagascar