Received: 18 February 2020
Accepted: 28 September 2020
First Online: 7 October 2020
Ethics approval and consent to participate
: This study has been approved by the Ethic Committee of the Affiliated Hospital of Xuzhou Medical University (NO. XYFY2018-aL040–08). Written informed consent was obtained from all patients included in the study.
: Not applicable.
: The authors declare that they have no competing interests.