1. Department of Anatomy, Division of Basic Medicine, Tokai University School of Medicine, Kanagawa, Japan
2. Graduate School of Human Environmental Studies, Course of Human Environmental Studies, Tokai University, Kanagawa, Japan
3. Department of Preventive Medicine, Tokai University School of Medicine, Kanagawa, Japan
4. Support Center for Medical Research and Education, Tokai University School of Medicine, Kanagawa, Japan