From article pdf - "This is an Open Access article distributed under the terms of the Creative
Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and
reproduction in any medium, provided the original work is properly cited"
CC website - 2.0 Generic CC-By - "You are free to:
Share — copy and redistribute the material in any medium or format" "Adapt — remix, transform, and build upon the material
for any purpose, even commercially." "This license is acceptable for Free Cultural Works." "The licensor cannot revoke these freedoms as long as you follow the license terms."
MA 11/1/18