1. Division
of Pharmacology, Department of Molecular Cell Biology, Samsung Biomedical
Research Institute, Sungkyunkwan University School of Medicine, Suwon, Gyeonggi-do 440-746, Republic of Korea
2. Department
of Pharmacology, School of Medicine, Ewha Womans University, Seoul 158-710, Republic of Korea
3. Department
of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146, United States