1. College of Medicine and Institute of Biomedical Science and Technology, Konkuk University, Chungju 380–701, Korea
2. Bio-Food and Drug Research Center, Konkuk University, Chungju, 380–701, Korea
3. College of Biomedical & Health Science, Konkuk University, Chungju, 380–701, Korea
4. College of Pharmacy, Sungkyunkwan University, Suwon 440–746, Korea
5. College of Pharmacy, Duksung Women's University, Seoul 132–714, Korea