Funding for this research was provided by:
National Cancer Institute (R01CA120562, R25CA094880)
Article History
Received: 6 October 2016
Accepted: 1 November 2016
First Online: 8 November 2016
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the institutional review board of the Group Health Research Institute.