1. Division of Cardiology, Nephrology, Pulmonology and Neurology; Department of Internal Medicine; Asahikawa Medical University; Asahikawa Japan
2. Departments of Nephrology and Urology; Kitasaito Hospital; Asahikawa Japan
3. Department of Internal Medicine; Asahikawa Rehabilitation Hospital; Asahikawa Japan
4. Department of Cardiology; Hokkaido Junkanki Hospital; Sapporo Japan