Published on in Vol 8, No 4 (2019): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12054, first published
.
1 Penn State Health, College of Medicine, Penn State University, Hershey, PA, United States
2 Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, MD, United States
3 University of Pittsburgh, Department of Public Health, Pittsburgh, PA, United States