1. Department of Rehabilitation Medicine, The University of Tokyo Hospital, Tokyo, Japan.
2. Department of Women's Health Nursing & Midwifery, Tohoku University Graduate School of Medicine, Miyagi, Japan.
3. Department of Urology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan.
4. Department of Urology, Jichi Medical University, Tochigi, Japan.
5. Department of Urology, Nagano Prefectural Shinshu Medical Center, Nagano, Japan.