1 Section of Gene Expression Regulation, Frontier Science Research Center, Kagoshima University, Kagoshima 890-8544, Japan.
2 Division of Pediatric Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Niigata University, Niigata 951-8514, Japan.
3 Department of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima 890-8544, Japan.