Received: 19 March 2021
Accepted: 5 September 2021
First Online: 16 September 2021
: The study was approved by the institutional review board of Sir Run Run Shaw Hospital (Zhejiang, China). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The informed consent requirement for this retrospective study was waived by The Ethics Committee of Sir Run Run Shaw Hospital, Affiliated to School of Medicine, Zhejiang University.
: Not applicable.
: The authors have no competing interests to declare.