1. Department of Microbiology and Immunology, University of Nevada, Reno, School of Medicine, Reno, Nevada, USA
2. Lao-Oxford-Mahosot Hospital Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People’s Democratic Republic
3. Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, United Kingdom
4. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom