1. Division of Neurology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
2. Division of Diabetes and Metabolic Diseases, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
3. Division of General Medicine, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
4. Department of Clinical Laboratory Medicine, Nihon University School of Medicine, Tokyo, Japan
5. Department of Neurology, Showa University School of Medicine, Tokyo, Japan