Article History
First Online: 22 January 2019
Compliance With Ethical Standards
:
: All authors declare that they have no conflict of interest.
: All procedures performed in studies 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. The protocol for this study, which used archival data, was examined by the Institutional Review Board of [omitted for blind review] University and deemed exempt from formal review.