1. Department of Periodontology and Endodontology, Oral and Maxillofacial Dentistry, Division of Medico‐Dental Dynamics and Reconstruction, Institute of Health Biosciences, The University of Tokushima Graduate School Tokushima Japan
2. Health Technology Research Center, Advanced Industrial Science and Technology Takamatsu Kagawa Japan
3. Division of Gene Expression, Institute for Genome Research, The University of Tokushima Graduate School Tokushima Japan
4. Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota Minneapolis MN USA