Zhang, H.
Fu, H.
Fu, X.
Zhang, J.
Zhang, P.
Yang, S.
Zeng, Z.
Fu, N. http://orcid.org/0000-0002-4639-3810
Guo, Z.
Funding for this research was provided by:
Tianjin Municipal Health and Family Planning Commission) (14KG124)
Article History
Received: 18 December 2020
Accepted: 16 May 2021
First Online: 2 June 2021
Declarations
:
: All procedures performed in research involving human participants comply with the ethical standards of the institution and/or the National Research Council, and comply with the 1964 Declaration of Helsinki and its subsequent amendments or similar ethical standards.
: This study was approved by the Ethics Committee of Tianjin Chest Hospital, and written informed consent of all participants was obtained before registration.
: There is no conflict of interest to be declared in this study.