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Article History

Received: 19 November 2020

Accepted: 17 March 2021

First Online: 23 March 2021

Declarations

:

: All procedures performed in study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The SEER Program collects data from population-based cancer registries with anonymous information. The SEER is a publicly available database, thus no ethical approval is required.

: Not applicable.

: The authors declare that they have no competing interests.