Article History
Received: 9 December 2020
Accepted: 28 January 2021
First Online: 8 February 2021
Ethics approval and consent to participate
: The study was approved by Institutional Review Board of Yantaishan Hospital, (No.2016CTEC-SL-015). Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.