1. Department of Industrial Hygiene and Safety, Faculty of Public Heath, Burapha University
2. Laboratory of Physical Chemistry, Molecular and Cellular Biology, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiangmai University
3. Department of Environmental and Occupational Health Sciences, Washington University
4. Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University
5. Bureau of Occupational and Environmental Disease, Ministry of Public Health, Thailand
6. Deparment of Animal Science and Environmental Toxicology, California-Davis University