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First Online: 23 August 2018

Compliance with Ethical Standards

:

: Steven Meanley declares that he has no conflicts of interest. James E. Egan declares that he has no conflicts of interest. José A. Bauermeister declares he has no conflicts 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.

: Informed consent was obtained from all individual participants included in the study.