1. Lao‐Oxford‐Mahosot Hospital‐Wellcome Trust Research Unit Microbiology Laboratory Mahosot Hospital Vientiane Lao PDR
2. Centre for Tropical Medicine Nuffield Department of Medicine Churchill Hospital University of Oxford Oxford UK
3. Faculty of Postgraduate Studies University of Health Sciences Vientiane Lao PDR
4. Mahidol‐Oxford Tropical Medicine Research Unit Faculty of Tropical Medicine Mahidol University Bangkok Thailand