Funding for this research was provided by:
Natural Science Foundation of China (81471517, 81871196)
Natural Science Foundation of China (81771270)
Natural Science Foundation of Shandong Province (ZR2018MH005, ZR2016HM59)
Shandong Province Science and Technology Development Program (2015GSF118164)
Received: 10 January 2019
Accepted: 17 June 2019
First Online: 6 July 2019
Ethics approval and consent to participate
: This study was reviewed and approved by the Ethical Board at Shandong Provincial Hospital Affiliated to Shandong University.
: Not applicable.
: The authors declare that they have no competing interests.