1. Department of Urology, University of Tsukuba Hospital, Tsukuba, Japan
2. National Institute of Polar Research, Tachikawa, Japan
3. Department of Surgery, Tokatsu Hospital, Nagareyama, Japan
4. International Platform for Dryland Research and Education, Tottori University, Tottori, Japan
5. SOKENDAI (The Graduate University for Advanced Studies), Tokyo, Japan