1. Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271–8587, Japan
2. Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing 100050, China
3. Department of Anesthesiology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271–8587, Japan
4. Department of Pathology, China Medical University, Shenyang, Liaoning 110001, China
5. Department of Anesthesiology, Nihon University School of Dentistry, Chiyoda, Tokyo 101–8310, Japan
6. Department of Pathology, Wakayama Medical University, Wakayama, Wakayama 641–8510, Japan
7. Department of Histology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271–8587, Japan