1. Department of Neurology, Faculty of Medicine, Fukushima Medical University, Fukushima, Japan,
2. Department of Neurology & Institute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany,
3. Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, University of Miyazaki, Miyazaki, Japan,
4. Department of Neurology, Kitasato University School of Medicine, Sagamihara, Japan,
5. Department of Orthopedic Surgery, Faculty of Medicine, Fukushima Medical University, Fukushima, Japan, and
6. Neurology, Fukushima Global Medical Science Center, Advanced Clinical Research Center, Fukushima Medical University, Fukushima, Japan