1. Department of Neurology, The Jikei University Kashiwa Hospital, Japan
2. Department of Respiratory Medicine, The Jikei University Kashiwa Hospital, Japan
3. Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Japan
4. Department of Neurology, The Keio University School of Medicine, Japan
5. Department of Neurology, The Kyorin University Hospital, Japan