Funding for this research was provided by:
Changjiang Scholar Program of Chinese Ministry of Education (2016)
the National Natural Science Foundation of China (81530050, 81771095, 81800971)
the National Natural Science Foundation of China (81700971, 81970947)
Shaanxi Key Science and Technology Innovation Team Project (2017KCT-32)
Received: 12 January 2020
Revised: 16 February 2020
Accepted: 20 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: The experimental protocol of this study was approved by the Ethics Committee of the Stomatological Hospital of FMMU (201203), and informed consent was signed by all the subjects who donated their extracted teeth for cell isolation.
: Not applicable.
: The authors declare that they have no competing interests.