Funding for this research was provided by:
National Cancer Institute (HHSN261201100031C, U54CA163303)
Received: 6 February 2017
Accepted: 4 August 2017
First Online: 22 August 2017
Ethics approval and consent to participate
: The San Francisco Mammography Registry and Vermont Breast Cancer Surveillance System registries obtain annual institutional review board approval and passive permission for data collection and enrollment of participants, as well as data linkages for research purposes, and they received a Federal Certificate of Confidentiality that protects the identities of research participants. For the Mayo Clinic screening cohort, a waiver of informed consent and Health Insurance Portability and Accountability Act authorization from the participants was approved by the institutional review board. Only individuals who had not refused permission to use their medical records for research were included from the Mayo Clinic cohort.
: Not applicable.
: The authors declare that they have no competing interests.
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