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. Department of Anatomy, Tokai University School of Medicine, Isehara, Japan
4. Division of Internal Medicine, Cupid Clinic, Iwamizawa, Japan
5. Emeritus professor of Akita University School of Medicine, Akita, Japan
6. Department of Anatomy and Human Embryology, Institute of Embryology, Complutense University, Madrid, Spain