1. Department of Neurology, Graduate School of Medicine, The University of Tokyo, Japan
2. Department of Biomedical Photonics & Engineering, Hamamatsu University School of Medicine, Japan
3. Department of Hematology and Oncology, Graduate School of Medicine, The University of Tokyo, Japan
4. Department of Neurology, Teikyo University Chiba Medical Center, Japan
5. Department of Cell Therapy and Transplantation Medicine, The University of Tokyo Hospital, Japan