1. Department of Environmental Health, Occupational Health and Safety, Faculty of Public Health, Khon Kaen University, Khon Kaen, Thailand
2. Department of Epidemiology and Biostatistics, Faculty of Public Health, Khon Kaen University, Khon Kaen, Thailand
3. Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, USA
4. Institute of Public Health, Aarhus University, Aarhus, Denmark