1. Division of Cariology, Operative Dentistry and Endodontics; Department of Oral Health Science; Niigata University Graduate School of Medical and Dental Sciences; Niigata 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. Department of Oral Histology; Institute for Dental Science; Matsumoto Dental University; Shiojiri Nagano Japan
4. Department of Pulp Biology and Endodontics; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan