Funding for this research was provided by:
Kaiser Permanente
Article History
Received: 14 July 2020
Accepted: 5 March 2021
First Online: 30 March 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: This retrospective study was reviewed and approved by the internal review boards of the State of California, California Cancer Registry and Kaiser Permanente. Both IRBs waived the right to obtain written or verbal consent for the de-identified dataset.