Critchfield, Thomas S.
Shue, Elva Z. H.
Article History
First Online: 23 February 2018
Compliance with Ethical Standards
: The research was not overseen by an Institutional Review Board or Animal Care and Use Committee because no living organisms were studied. Informed consent was not sought or required because the potential behaviors of interest were publicly observable.
: The authors declare that they have no conflict of interest.