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Article History

Received: 5 October 2017

Accepted: 25 January 2018

First Online: 8 February 2018

Ethics approval and consent to participate

: This work deemed Exempt Research under 45 CFD 46.101(b(4) by the Kaiser Permanente Washington Institutional Review Board and granted a waiver of written consent.

: Not applicable.

: The authors are employed by Kaiser Permanente Washington and the Kaiser Permanente Washington Health Research Institute. Neither Kaiser Permanente Washington nor the Group Health Foundation had any influence on the design of this study, data collection, analysis, presentation of findings, or the decision to publish these results. The authors have no other financial conflicts of interests to report.

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