1. Department of Oral and Maxillofacial Surgery, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
2. Department of Oral Pathology and Biology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
3. Department of Oral and Maxillofacial Surgery, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
4. Department of Molecular Cell Pharmacology, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan