Funding for this research was provided by:
National Natural Science Foundation of China (71673291, 71774167)
Natural Science Foundation of Zhejiang Province (LQ21H100001)
Shanghai Pujiang Programme (19PJC112)
Received: 22 February 2021
Accepted: 25 May 2021
First Online: 5 June 2021
: This study was approved by the Second Military Medical University ethics committee (approval reference number: 2013LL058). All participants were informed of the study objectives and assured that their information and responses were kept confidential.
: Not applicable.
: The authors declare that they have no competing interests.