1. The Channing Laboratory, Brigham and Women's Hospital, and Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115
2. Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu 700-422, South Korea
3. Beth Israel Deaconess Medical Center Genomics Center and Bioinformatics Core, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02115
4. Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115