1. Department of Cell Biology, Laboratory of Molecular Genetics, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma
2. Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University, Tokyo
3. Department of Pathological Physiology, Institute of Neurological Diseases, Hirosaki University, Hirosaki, Japan.
4. Department of Molecular Medicine, Laboratory of Gene Analysis, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma