Funding for this research was provided by:
National Cancer Institute (U54CA143931, U54CA143930, P30CA16042)
Article History
Received: 15 January 2020
Accepted: 11 September 2020
First Online: 22 September 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Ethical approval was not required for this analysis because it utilized publicly available de-identified vital statistics data.