Chen, Xijie
Hu, Jiancong
Xu, Liang
Chen, Junguo
Lin, Yanyun
Chi, Zengjie
He, Xiaosheng http://orcid.org/0000-0002-8346-4972
Lan, Ping
Funding for this research was provided by:
The national Key R&D Program of China (2017YFC1308800)
National Natural Science Foundation of China (81970482)
Natural Science Foundation of Guangdong Province (2019A1515011313)
The Sixth Affiliated Hospital of Sun Yat-Sen University Clinical Research-‘1010’ Program (1010PY(2020)-63)
Article History
Accepted: 14 July 2021
First Online: 23 July 2021
Declarations
:
: The data contained in the current study were extracted from the open-access SEER database that could be used for medical study. The patient’s name was replaced by an internal ID number that is unable to be accessed by others. The results of the current study will not cause any harm to the patients, and it will be beneficial to subsequent patients. Therefore, no ethical approval is required. This study was conducted adhered to the ethical standards of the World Medical Association Declaration of Helsinki and the Ethical Guidelines for Clinical Research.
: Informed consent was waived in this study.
: This manuscript has not been published in whole or in part nor is it being considered for publication elsewhere. All the authors approved the final version of the article, including the authorship list, and all the authors agree to publish this journal.
: The authors declare no competing interests.