Funding for this research was provided by:
National Natural Science Foundation of China (81471222)
Taishan Scholars Construction Engineering of Shandong Province (ts20130914)
Received: 8 September 2019
Accepted: 20 December 2019
First Online: 29 December 2019
Ethics approval and consent to participate
: All the animal experimental protocols were approved by the Ethics Committee of Shandong Provincial Qianfoshan Hospital.
: Not applicable
: The authors declare that they have no competing interests.