1. Division of Genetic Disease, Department of Biomedical Science, National Institute of Health, Seoul 122-701, Korea
2. Department of Biochemistry, University of Texas Health Science Center, San Antonio, TX 78229-3900
3. Research Institute of Immunology, Catholic Institutes of Medical Science, The Catholic University of Korea, Seoul 137-701, Korea
4. Department of Pathology, SongDo Hospital, Seoul 100-453, Korea
5. Department of Biochemistry, University of Western Australia, Nedlands, Western Australia, Australia
6. Korea Institute of Science and Technology, Seoul 130-650, Korea
7. Department of Pediatrics, Yonsei University Medial School, Seoul 120-752, Korea