Critchfield, Thomas S.
Article History
First Online: 4 June 2018
Compliance with Ethical Standards
:
: This article does not contain studies conducted with any member of Animalia, Plantae, Fungi, Protista, Bacteria, or Archaea, so oversight by an institutional research ethics committee is not applicable.
: Because no primary empirical data were collected from human participants, informed consent is not applicable.
: The author declares no conflicts of interest with respect to this article.