1. Division of Neurology and Clinical Neuroscience, Department of Internal Medicine III, Yamagata University Faculty of Medicine, Japan
2. Department of Dentistry, Oral and Maxillofacial-Plastic and Reconstructive Surgery, Yamagata University Faculty of Medicine, Japan
3. National Hospital Organization Yonezawa Hospital, Japan
4. National Hospital Organization Yamagata Hospital, Japan
5. Yamagata City Office, Japan