1Department of Neurology, National Hospital Organization Okayama Medical Center, Okayama, Japan
2Transplantation Center, National Hospital Organization Okayama Medical Center, Okayama, Japan
3Department of Pathology, National Hospital Organization Okayama Medical Center, Okayama, Japan
4Department of Pathology, Postgraduate School of Medicine, Dentistry, and Pharmacology, Okayama University, Okayama, Japan
5Department of Neurology, Graduate School of Medicine, Dentistry, and Pharmacology, Okayama University, Okayama, Japan