1. College of Public Health Sciences, Chulalongkorn University, Bangkok, Thailand
2. Center for Risk Analysis and Health Surveillance, Chulalongkorn University, Bangkok, Thailand
3. College of Medicine and Public Health, Ubon Ratchathani University, Ubon Ratchathani, Thailand
4. Faculty of Public Health, Kasetsart University, Sakon Nakhon, Thailand
5. School of Environmental and Biological Sciences, Rutgers University, New Brunswick, New Jersey, USA