1. Department of Oral Functional Anatomy; Hokkaido University Graduate School of Dental Medicine; Sapporo Japan
2. Division of Anatomy and Cell Biology of the Hard Tissue; Department of Tissue Regeneration and Reconstruction; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
3. Laboratory of Physical Anthropology; Department of Zoology; Graduate School of Science; Kyoto University; Kyoto Japan