Article History
Received: 24 November 2020
Accepted: 1 February 2021
First Online: 18 February 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the institutional review board at Zhongshan Hospital of Fudan University. Since it was a secondary analysis based on an existing database, written and informed consent was waived.
: The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.