Received: 11 November 2020
Accepted: 25 January 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: The study was approved by the ethics committee of the First Affiliated Hospital, Zhejiang University School of Medicine, and was in accordance with the tenets of the Declaration of Helsinki. Informed written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.