1. Thailand Ministry of Public Health (MOPH)-U.S. Centers for Disease Control and Prevention Collaboration (TUC), Nonthaburi, Thailand;
2. Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand;
3. Division of Global Health Protection, Centers for Disease Control and Prevention, Atlanta, Georgia;
4. Nakhon Phanom Provincial Hospital, Nakhon Phanom, Thailand;
5. Sa Kaeo Crown Prince Hospital, Sa Kaeo, Thailand