1. a College of Pharmacy, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, South Korea
2. b Department of Life Science, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea
3. c Department of Pathology, School of Medicine, Chonnam National University, Gwangju 500-757, South Korea
4. d College of Pharmacy, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, South Korea