1. Department of Internal Medicine, Kin-ikyo Chuo Hospital, Sapporo 007-8505, Japan
2. Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 060-8648, Japan
3. Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo 060-8648, Japan
4. Department of Cancer Pathology, Faculty of Medicine, Hokkaido University, Sapporo 060-8648, Japan
5. Department of Pathology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo 173-0015, Japan
6. Division of Diabetes and Obesity, Faculty of Medicine and Graduate School of Medicine Hokkaido University, Sapporo 060-8648, Japan
7. Sawamura Neurosurgery Clinic, Sapporo 060-0807, Japan
8. Advanced Medical Care Center, Kusatsu General Hospital, Kusatsu 525-8585, Japan