Funding for this research was provided by:
Breast Cancer Research Foundation
American Cancer Society (RSG-18-116-01-CPHPS)
Received: 7 May 2019
Accepted: 23 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: A Data-Use Agreement Form was required by the National Cancer Institute’s SEER Program prior to access to the de-identified SEER dataset. Since the de-identified data were used, approval from the Institutional Review Board of Washington University in St. Louis and patients’ informed consent were not required.
: Not applicable.
: The authors declare that they have no competing interests.