1. Department of Endodontics; Tianjin Medical University School of Stomatology; Tianjin China
2. Laboratory of Molecular Signaling and Stem Cells Therapy; Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction; Capital Medical University School of Stomatology; Beijing China
3. Department of Stomatology; Beijing Shijitan hospital; Capital Medical University; Beijing China
4. Molecular Laboratory for Gene Therapy and Tooth Regeneration; Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction; Capital Medical University School of Stomatology; Beijing China