1. Department of Anatomy Wuxi School of Medicine Jiangnan University Wuxi China
2. Department of Anatomy School of Medicine International University of Health and Welfare Narita Japan
3. Division of Internal Medicine Jikoukai Clinic of Home Visit Sapporo Japan
4. Institute of Anatomy and Cell Biology School of Medicine Georg‐August‐Universität Göttingen Göttingen Germany
5. Department of Anatomy and Human Embryology Faculty of Medicine Complutense University Madrid Spain
6. Department of Anatomy Tokyo Dental College Tokyo Japan