Wang, Zixiao
Wang, Yuhang
Sun, Daqiang
Article History
Received: 25 July 2021
Accepted: 18 March 2022
First Online: 8 April 2022
Declarations
:
: Our study was approved by the ethics committee of Tianjin chest hospital. Our study was in compliance with the regulations and carried out in accordance with the relevant guidelines. Because it was an observational study, we obtained exemption from informed consent.
: Not applicable.
: The authors declare that they have no competing interests.