1 Centre of Tropical Medicine and Travel Medicine, Amsterdam University Medical Centre, Department of Infectious Diseases, University of Amsterdam, Amsterdam, Netherlands.
2 Instituto de Microbiologia, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
3 Centre de Recherches Médicales en Lambaréné, Lambaréné, Gabon.
4 Clinical Academic Group, Institute for Infection and Immunity, and St George's University Hospitals NHS Foundation Trust, St George's University of London, London, UK.
5 Institut für Tropenmedizin, Universitätsklinikum Tübingen, Tübingen, Germany.
6 Masanga Medical Research Unit, Masanga, Sierra Leone.
7 Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa.