Wang, Jinkui
Tang, Jie
Liu, Xiaozhu
He, Dawei
Article History
Received: 9 October 2021
Accepted: 20 April 2022
First Online: 24 May 2022
Declarations
:
: Since the cancer information in the SEER database is public and anonymous, patient informed consent and ethical approval are not required. All methods in the study were carried out in accordance with the Helsinki guidelines and declaration or any other relevant guidelines.
: None.
: The authors declare that they have no competing interests.