1. Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
2. Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
3. Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok, Thailand
4. Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok, Thailand