1. Department of Anatomy, Jeonbuk National University Medical School, Jeonju, Korea
2. Department of Anatomy, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, China
3. Emeritus professor of Akita University, Akita
4. Division of Internal Medicine, Cupid Clinic, Iwamizawa, Japan,
5. Department of Anatomy and Embryology, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain
6. Department of Urology, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan