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Article History

Received: 17 July 2018

Accepted: 22 October 2018

First Online: 6 November 2018

Ethics approval and consent to participate

: NCDB data has been de-identified in accordance with The Health Insurance Portability and Accountability Act. Institutional review board approval was obtained at the Roswell Park Comprehensive Cancer Center.

: Not applicable.

: The authors declare that they have no competing interests.

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