Yang, Shujun
Chang, Wei
Zhang, Bin
Hou, Qian
Zhang, Biao
Kang, Yindong
Yin, Yongsheng
Wan, Jianghou
Shang, Panfeng
Article History
Received: 22 March 2023
Accepted: 15 April 2023
First Online: 31 July 2023
Declarations
:
: The authors declared no conflict of interest.
: The study was conducted according to the guidelines of the Declaration of Helsinki. The SEER database is a public database and does not require ethical approval. This research is a retrospective study and involves research in humans. The study passed the ethical review of the Lanzhou University Second Hospital (2021A-085).