1. Accident Prevention and Assessment Division, National Institute of Chemical Safety, Ministry of Environment
2. Pesticide and Veterinary Drug Residues Division, Department of Food Safety Evaluation, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety
3. Nutrition Safety Policy Division, Bureau of Food Nutrition and Dietary Safety, Ministry of Food and Drug Safety
4. Department of Biofood Science and Biotechnology, Chungbuk Provincial University