1. Department of Urology, Shiga University of Medical Science, Otsu, Japan.
2. Division of Medical Life System, Department of Life and Medical Science, Doshisha University, Kyotanabe, Japan.
3. Department of Surgery, Yawata Chuo Hospital, Yawatagotanda, Yawata, Japan.
4. Department of Gastroenterology, Ueda Clinic, Kitanakaieshita, Takanosu, Japan.