Chai, Mei
Shi, Qingming
Article History
Received: 25 July 2019
Accepted: 10 November 2020
First Online: 19 November 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Anhui Chest Hospital. Written consent was obtained from patients or his/her representatives.
: Not applicable.
: The authors declare that they have no competing interests.