1 Hospital for Tropical Disease, Ho Chi Minh City, Vietnam. Electronic address: [email protected].
2 Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
3 Hospital for Tropical Disease, Ho Chi Minh City, Vietnam.
4 Children's Hospital 1, Ho Chi Minh City, Vietnam.
5 Centre for Disease Control, Ho Chi Minh City, Vietnam.
6 Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK.
7 Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam. Electronic address: [email protected].