Funding for this research was provided by:
National Natural Science Foundation of China (NO.81500819 and No.81371117)
National Institute of Dental and Craniofacial Research (K99E025915)
Received: 2 July 2017
Revised: 24 August 2017
Accepted: 12 September 2017
First Online: 29 September 2017
: All animal experiments were approved by The Ethics Committee of the Peking University Health Science Center (LA2016149).
: Not applicable.
: The authors declare that they have no competing interests.
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