Liu, Peng
Xu, Lei
Chen, Guanghao
Shi, Benkang
Zhang, Qiujie
Chen, Shouzhen
Funding for this research was provided by:
Shandong Medical and Health Science and Technology Development Plan Project (2018WS333)
National Natural Science Foundation of China (81970661)
Taishan Scholar Foundation of Shandong Province (ts201511092)
Article History
Received: 20 June 2022
Accepted: 1 February 2023
First Online: 13 February 2023
Declarations
:
: Data were extracted from SEER using SEER*Stat software version 8.4.0 (ExternalRef removed) and from the Qilu hospital of Shandong University using the hospital’s medical record system. Patient consent and institutional review board approval for the SEER database were not required. The Ethics Committee of Qilu hospital of Shandong University approved protocols and the study for the datasets studied which are taken from the Qilu hospital of Shandong University using the hospital’s medical record system. The Ethics Committee of Qilu hospital of Shandong University waived of written informed consent. The entire study was performed in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.