Funding for this research was provided by:
the Liaoning Province Science and Technology Program Project (2019JH8/10300089)
Received: 23 February 2022
Accepted: 29 April 2022
First Online: 11 May 2022
: This study was approved by the Ethics Committee of the Shenyang Chest Hospital and Tenth People's Hospital. The SEER database was used with permission.
: Not applicable.
: The authors declare that they have no competing interests.