Article History
Received: 21 August 2018
Accepted: 27 November 2018
First Online: 13 December 2018
Compliance with ethical standards
:
: Blair P Curless declares that he has no conflict of interest. Nne E Uko declares that she has no conflict of interest. Diane F Matesic declares that she has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: For this type of study, formal consent is not required.