Text and Data Mining valid from 2018-10-17
First Online: 17 October 2018
Compliance with Ethical Standards
: All procedures performed involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. IRB approval for this study was obtained at the University of Minnesota-Duluth and the University of Washington. Informed consent was obtained from all participants in the study. Data for this study have not been reported elsewhere, nor used in prior research.
: The authors declare that they have no conflict of interest.