1. Department of Anatomy, Jeonbuk National University Medical School, Jeonju, Korea
2. Department of Anatomy, School of Medicine, International University of Health and Welfare, Narita, Japan
3. Department of Anatomy, Tokyo Dental College, Tokyo, Japan
4. Division of Internal Medicine, Jikou-kai Clinic of Home Visits, Sapporo, Japan
5. Department of Anatomy, School of Medicine, Georg-August-Universität Gőttingen, Gőttingen, Germany
6. Department of Anatomy and Embryology, School of Medicine, Complutense University, Madrid, Spain