1. Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
2. Department of Urology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
3. Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
4. Department of Urology, Aomori Prefectural Central Hospital, Aomori, Japan