Liang, Zongyu
Xiang, Deyu
Feng, Jiahao
Lyu, Haina
Li, Zhu
Mai, Guangzhi
Yang, Qingshui
Wang, Wanchuan
Zhang, Xiaobin
Article History
Accepted: 5 July 2023
First Online: 11 July 2023
Declarations
:
: Permission was obtained to retrieve SEER data files with the reference number 19019-Nov2021. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. No ethics approval was declared because the SEER is a publicly available database.
: As patient data were recorded in the SEER database without involving any individual identification, the present study was dispensed with signing informed consent forms.
: The authors declare no competing interests.