1. Department of Endodontology and Operative Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
2. Mesenchymal Stem Cell Laboratory, School of Medical Sciences, University of Adelaide, Adelaide, Australia.
3. Colgate Australian Clinical Dental Research Centre, School of Dentistry, University of Adelaide, Adelaide, Australia.
4. Department of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, Osaka, Japan.