1. Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People’s Democratic Republic;
2. Nuffield Department of Medicine, Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, United Kingdom;
3. Adult Infectious Diseases Ward, Mahosot Hospital, Vientiane, Lao People’s Democratic Republic;
4. Oudomxay Provincial Health Department, Oudomxay, Lao People’s Democratic Republic;
5. Huaphan Provincial Health Department, Huaphan, Lao People’s Democratic Republic;
6. Institute of Research and Education Development, University of Health Sciences, Vientiane, Lao People’s Democratic Republic;
7. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom