1. Apheresis and Dialysis Center, Keio University School of Medicine, Tokyo, Japan
2. Seigakai Shibuya Station Clinic, Tokyo, Japan
3. Seigakai Yoyogi Station Clinic, Tokyo, Japan
4. Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
5. Department of Urology, Keio University School of Medicine, Tokyo, Japan