He, Qing-Song
Wang, Zhen-Ping
Li, Zhao-Jun
Zhou, Ping
Lian, Chen-Lu
Wu, San-Gang http://orcid.org/0000-0002-0556-2614
Chen, Si-Fang
Article History
Received: 15 June 2021
Accepted: 11 September 2021
First Online: 20 September 2021
Declarations
:
: This study was based on the publicly available SEER database and we have got permission to access them for research only (Reference number: 11025-Nov2016). As the SEER database consists of de-identified information, the study was exempt from the approval process of the Institutional Review Boards of the First Affiliated Hospital of Xiamen University.
: Not applicable.
: The authors declare that they have no competing interests.