1. Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
2. Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Japan
3. Department of Urology, Kanagawa Rehabilitation Hospital, Atsugi, Japan
4. Department of Urology, Yokohama City University, Yokohama, Japan
5. Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States