Received: 8 October 2020
Accepted: 20 January 2021
First Online: 29 January 2021
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the affiliated hospital of Qingdao University. Written informed consent was obtained from all patients. No children (under 16 years old) were included in this study.
: Not applicable.
: We declare that we have no Conflict of Interest.