1. Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Kodaira, Tokyo
2. Department of Neurology, Osaka Red Cross Hospital, Osaka, Japan
3. Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
4. Department of Neurology, Daisan Hospital, Jikei Medical University, Tokyo
5. Department of Neurology, Showa Medical University, Tokyo
6. Department of Neurology, Jikei Medical University, Tokyo
7. Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology, Faculty of Medicine, Yamagata University, Yamagata, Japan