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Authors
Liu, Haiyun
Zhang, Shuxia
Liu, Xiaohui
Wang, Qianqian
Zhang, Hongjie
Cui, Weihong
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Article History
Received: 8 June 2024
Accepted: 15 November 2024
First Online: 30 December 2024
Declarations
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: Not applicable. This study collected data on patients with malignant tumors strictly following the Measures for the Administration of Tumor Registration issued by China's National Health Commission. The study did not involve the collection of biological specimens or direct patient contact, thus ethical approval was not required. As a retrospective study, the need for written informed consent was waived by the ethics committee of Yantai CDC. All methods were conducted with the utmost care to protect patient privacy and ensure information security, in compliance with the guidelines and regulations for population-based cancer registries set by the China CDC.
: Not applicable.
: The authors declare no competing interests.
