1. Wellcome Trust Asia Programme—Oxford University Clinical Research Unit, 78 Giai Phong, Dong Da, Ha Noi, Viet Nam
2. Wellcome Trust Asia Programme—Oxford University Clinical Research Unit, 764 Vo Van Kiet, Ward 1, District 5, Ho Chi Minh, Viet Nam
3. Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Old Road campus, Roosevelt Drive, Headington, Oxford, UK
4. National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam
5. National Institute for Hygiene and Epidemiology, 131 Lo Duc, Hai Ba Trung, Hanoi, Viet Nam
6. Radboud UMC, Geert Grooteplein Zuid 10, GA, Nijmegen, the Netherlands