1. Division of Rheumatology, Department of Internal Medicine, Toho University School of Medicine, 6-11-1 Omori-Nishi, Ota-ku, Tokyo 143-8541, Japan
2. Department of Neurology, Toyama University Hospital, Toyama, Japan
3. Division of Kidney and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, Japan
4. Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, Japan
5. Internal Medicine, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan