- Received February 24, 2017.
- Accepted March 24, 2017.
- Published online April 12, 2017.
Copyright & Usage
Copyright © 2017 McCarthy and Fitzpatrick. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.
- Aaron P. Mitchell, Editor, Carnegie Mellon University
- Charley G. P. McCarthy and
- David A. Fitzpatrick
- Address correspondence to David A. Fitzpatrick, .