Ma, Xu
Jie, Bing
Yu, Dong
Li, Ling-Ling
Jiang, Sen
Article History
Received: 14 April 2021
Accepted: 25 June 2021
First Online: 13 July 2021
Declarations
:
: The present study was conducted in accordance with the amended Declaration of Helsinki. All authors confirmed that all methods were performed in accordance with the relevant guidelines and regulations. This retrospective observational study has been approved by the ethics committee of Shanghai Pulmonary Hospital, and the ethics committee of Shanghai Pulmonary Hospital declared the informed consent can be waived because of its retrospective nature (The Certificate No: K20-410).
: Not applicable.
: The authors declare that they have no competing interests.