1. Human Genome Research Institute and Cancer Research Institute, BK21 Human Life Sciences, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-799, South Korea
2. Department of Pharmacology, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-799, South Korea
3. Department of Pharmacology, Chonbuk National University College of Medicine, Chonju, South Korea,
4. Department of Biochemistry, Kyungpook National University, College of Medicine, Taegu, South Korea