Funding for this research was provided by:
National Natural Science Foundation of China (81500822)
National Natural Science Foundation of China (81570953)
Project for Culturing Leading Talents in Scientific and Technological Innovation of Beijing (Z171100001117169)
PKU School of Stomatology for Talented Young Investigators (PKUSS20140109)
Beijing Nova Program (Z181100006218037)
Text and Data Mining valid from 2019-02-13
Received: 24 December 2018
Revised: 30 January 2019
Accepted: 4 February 2019
First Online: 13 February 2019
Ethics approval and consent to participate
: This study was carried out in strict accordance with the recommendations of the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. The protocol was approved by the Institutional Animal Care and Use Committee of the Peking University Health Science Center (approval no. LA2014233). All surgeries were performed under anesthesia, and all efforts were made to minimize animal suffering.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.