1 Division of Pediatric, Dentistry School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu, Ishikari, Hokkaido, 061-0293, Japan.
2 Division of Biomaterials and Bioengineering, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu, Japan.
3 Division of Dental Education Development, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu, Japan.
4 Division of Oral Medicine and Pathology, Dentistry School of Dentistry, Health Sciences University of Hokkaido, Tobetsu, Japan.
5 Division of Pediatric, Dentistry School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu, Ishikari, Hokkaido, 061-0293, Japan. [email protected].