Funding for this research was provided by:
National Natural Science Foundation of China (81970522)
the Key Research and Development Project of Shandong Province (2019GSF108023)
Article History
Received: 14 July 2019
Accepted: 23 September 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: The study was approved by the Local Ethics Committee of Qilu Hospital of Shandong University ((KYLL-2017(KS)-076).
: All authors approved the final manuscript.
: The authors declare that they have no competing interests.