1. International Platform for Dryland Research and Education, Tottori University, Tottori 680-0001, Japan
2. Department of Gastroenterological Surgery I, Hokkaido University, Sapporo 060-8648, Japan
3. Department of Urology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
4. Department of Surgery, Tokatsu Hospital, Nagareyama 270-0153, Japan
5. National Institute of Polar Research, Tachikawa 190-8518, Japan
6. Division of Health Administration and Promotion, Department of Social Medicine, School of Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan