1. International Respiratory and Severe Illness Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington, USA
2. Kampong Cham Provincial Hospital, Kampong Cham
3. Médecins Sans Frontières France, Kampong Cham
4. Diagnostic Microbiology Development Programme, Phnom Penh
5. University of Health Sciences, Phnom Penh
6. University of Health Sciences, Phnom Penh, Calmette Hospital, Phnom Penh, Cambodia