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Article History

Received: 9 September 2017

Accepted: 8 October 2018

First Online: 9 November 2018

Ethics approval and consent to participate

: The A.T. Still University-Kirksville, Missouri Institutional Review Board committee considered the current study exempt.

: Not applicable.

: EWH is an employee of the company that owns the copyrights to the HPLI. The other authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.