1 Department of Physiology, Tokyo Dental College, Tokyo, Japan.
2 Department of Clinical Sciences and Stomatology, Università Politecnica delle Marche, Ancona, Italy.
3 Department of Innovation and Precision Dentistry, Hiroshima University Hospital, Hiroshima, Japan.
4 Brodie Tooth Development Genetics and Regenerative Medicine Research Laboratory, College of Dentistry, University of Illinois at Chicago, Chicago, IL, United States.