1. Department of Biochemistry, School of Dentistry, Showa University, Tokyo, Japan.
2. Department of Oral Physiology, School of Dentistry, Showa University, Tokyo, Japan.
3. Department of Prosthodontics, School of Dentistry, Showa University, Tokyo, Japan.
4. Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Miyagi, Japan.
5. Department of Oral Anatomy and Developmental Biology, School of Dentistry, Showa University, Tokyo, Japan.