Funding for this research was provided by:
National Natural Science Foundation of China (81571703, 81971645)
Outstanding Young Talents Program of Shanghai Municipal Commission of Health and Family Planning (2017YQ027)
Received: 13 February 2020
Accepted: 4 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were approved by the ethics committee at Shanghai Pulmonary Hospital, Tongji University School of Medicine, and with the principles of the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.