School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi. Department of Global Public Health and Primary Care, Centre for International Health, University of Bergen, Bergen, Norway. Mahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand. Nuffield Department of Medicine, Centre for Tropical Medicine, University of Oxford, Oxford, United Kingdom. Department of Pediatrics and Child Health, Makerere University College of Health Sciences, Kampala, Uganda. Kenya Medical Research Institute (KEMRI), Centre for Global Health Research, Kisumu, Kenya. Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom. Department of Clinical Science, University of Bergen, Bergen, Norway. Norwegian National Advisory Unit on Tropical Infectious Diseases, Haukeland University Hospital, Bergen, Norway.