1. Department of Neurology, Gifu University Graduate School of Medicine, Gifu, Japan
2. Autopsy Center of Prion Disease, Institute for Medical Sciences of Aging, Aichi Medical University, Nagakute, Japan
3. Department of Neurology, Kakamigahara Rehabilitation Hospital, Kakamigahara, Japan
4. Department of Neurology, Gifu Municipal Hospital, Gifu, Japan
5. Department of Locomotive Rehabilitation Sciences, Nagasaki University Graduate School of Medicine, Nagasaki, Japan
6. Division of CJD Science and Technology, Department of Prion Research, Center for Translational and Advanced Animal Research on Human Diseases, Tohoku University School of Medicine, Sendai, Japan