1. Division of Laboratory Animal ResourcesKorea FDA, National Institute of Toxicological Research Seoul 122–704
2. Collage of PharmacyChungbuk National University Cheongju 361–763
3. Division of NeurotoxicologyKorea FDA, National Institute of Toxicological Research Seoul 122–704
4. Department of BiologyChungnam National University Taejon 305–704 Korea