Received: 21 March 2020
Accepted: 10 August 2020
First Online: 24 August 2020
Ethics approval and consent to participate
: Ethics approval for this study was obtained from the Fourth Affiliated Hospital, Zhejiang University School of Medicine (No.2015-0-09). All patients gave written informed consent for participation in the study.
: Not applicable.
: All authors declare no conflicts of interest.