Published on in Vol 7 , No 8 (2019) :August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12983, first published
.

1 Seidenberg School of Computer Science and Information Systems, Pace University, New York, NY, United States
2 Foisie Business School, Worcester Polytechnic Institute, Worcester, MA, United States