Funding for this research was provided by:
the Key Medical Specialty of Shanghai (Grant No. ZK2019A15)
Article History
Received: 3 December 2020
Accepted: 28 March 2021
First Online: 7 April 2021
Declarations
:
: The study protocol was approved by the Shanghai Tongren hospital ethics committee. Written informed consent was obtained from all participating patients before operation. All procedures performed in this study were in accordance with the ethical standards of the 1964 Helsinki declaration and its later amendments.
: Not applicable.
: We declare that we have no competing interests.