1 Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Mahosot Hospital, Vientiane, Lao Democratic People's Republic; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom; Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom. Electronic address: david.d@tropmedres.ac.
2 University of Sydney, Sydney, Australia.
3 Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Mahosot Hospital, Vientiane, Lao Democratic People's Republic.
4 Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Mahosot Hospital, Vientiane, Lao Democratic People's Republic; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.
5 Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Infectious Diseases Group, Genome Institute of Singapore, Singapore.
6 Department of Laboratory Medicine, Tan Tock Seng Hospital, Singapore.