1. Division of Urology, Department of Regenerative and Transplant Medicine, Department of Molecular and Cellular Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
2. Department of Pathology Niigataken Kouseiren Byori Center, Tokyo, Japan
3. Nagaoka and Pharmaceuticals Group, Nippon Kayaku Co., Ltd., Tokyo, Japan