Department of Cell Fate Modulation, Institute of Molecular Embryology and Genetics, Kumamoto University, 2-2-1 Honjo, Kumamoto 860-0811, Japan;Centre for Brain Repair, University of Cambridge, E. D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 2PY, United Kingdom; and Department of Orthopaedic Surgery, Kagoshima Graduate School of Medicine and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan (2004-01-07時点)