1. Nihon University Graduate School of Dentistry at Matsudo, Histology and Embryology, Matsudo, Chiba 271 – 8587, Japan
2. Nihon University Graduate School of Dentistry at Matsudo, Anesthesiology, Matsudo, Chiba 271 – 8587, Japan
3. Departments of Anesthesiology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan
4. Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan
5. Departments of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan
6. Departments of Histology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan