1. College of Pharmacy and Research Institute of Pharmaceutical Sciences; Seoul National University; Seoul 151-742 Republic of Korea
2. Albany College of Pharmacy and Health Sciences; Albany New York 12208 USA
3. Food Chemical Residues Division; Korea Food & Drug Administration; Tongil-ro Eunpyeong-gu Seoul 122-704 Republic of Korea
4. School of Pharmacy; Sungkyunkwan University; Suwon 440-746 Republic of Korea
5. Institute for Medical Sciences; Ajou University School of Medicine; San 5, Wonchon-dong Yeongtong-gu Suwon 443-749 Republic of Korea