Funding for this research was provided by:
National Cancer Institute (R01CA154982-04)
Received: 20 July 2017
Accepted: 18 April 2018
First Online: 2 May 2018
Ethics approval and consent to participate
: The Kaiser Permanente Northwest Institutional Review Board approved the study on August 23, 2011. Participants who gave verbal consent to be part of the study received an information sheet in the mail (with the 2 FIT kits enclosed) explaining the benefits, risks and costs of the study and outlining other elements of informed consent. Given that there were no study visits, the Institutional Review Board approved verbal consent with distribution of the information sheet, to enable feasibility of study completion.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.