1. Department of Biomedical Sciences, Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 110-799, Korea.
2. Department of Genomics Core Laboratory, Seoul National University College of Medicine, Seoul 110-799, Korea.
3. Genomic Medicine Institute, MRC, Seoul National University College of Medicine, Seoul 110-799, Korea.
4. Korea Chemical Bank, Korea Research Institute of Chemical Technologies, Daejeon 305-600, Korea.