Funding for this research was provided by:
National Natural Science Foundation of China (81271966)
Natural Science Foundation of Shandong Province of China (ZR2018MH007)
Received: 28 April 2019
Accepted: 19 June 2019
First Online: 4 July 2019
Ethics approval and consent to participate
: The present study was performed in compliance with Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. The experimental protocol was approved by the Experimental Animal Ethics Committee of Shandong Provincial Hospital Affiliated to Shandong University (No. 2018-031).
: Not applicable.
: The authors declare that they have no competing interests.