Douglas Beets, S.
Beets, Mary G.
Article History
Received: 26 October 2016
Accepted: 5 April 2017
First Online: 12 April 2017
Compliance with Ethical Standards
:
: S. Douglas Beets declares that he has no conflict of interest. Mary G. Beets 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.