Published on in Vol 8, No 5 (2019): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12455, first published
.
1 Department of Biostatistics and Epidemiology, University of Massachusetts Amherst, Amherst, MA, United States
2 Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, United States
3 College of Nursing, University of Massachusetts Amherst, Amherst, MA, United States