Cheng, Shizhao
Yang, Lei
Dai, Xin
Wang, Jing
Han, Xingpeng
Article History
Received: 2 June 2021
Accepted: 22 September 2021
First Online: 26 September 2021
Declarations
:
: The present study used previously collected anonymized and de-identified data from the SEER database. Therefore, no additional informed consent was required. The study was complied with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards and deemed exempt from review by the Ethics Board of the Tianjin Chest Hospital.
: Not applicable.
: The author reports no conflicts of interest in this work.