Funding for this research was provided by:
National Natural Science Foundation of China (81600222, 81800255)
Natural Science Foundation of Shandong Province (ZR2018BH002)
Young experts of Taishan Scholar Program of Shandong Province (tsqn201812142)
Received: 22 April 2020
Accepted: 28 July 2020
First Online: 7 August 2020
Ethics approval and consent to participate
: This single-center retrospective cohort study was approved by the Ethics Committee of Shandong Provincial Hospital and the written informed consent was waived due to the retrospective design.
: Consents for publication were obtained from all individuals involved in our study.
: The authors declare that they have no competing interests.