Funding for this research was provided by:
National Natural Science Foundation of China (81501235)
Shengjing Hospital of China Medical University (MF95)
Natural Science Foundation of Liaoning Province (2018010551-301)
Received: 18 September 2019
Accepted: 6 May 2020
First Online: 14 May 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This retrospective study was approved by the ethical committee of Shengjing Hospital of China Medical University. Written informed consent was obtained from all individual participants included in the study.
: Not Applicable.
: All authors declare no conflict of interests.