Published on in Vol 20 , No 5 (2018) :May
Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/9434, first published .
1 The Geisel School of Medicine at Dartmouth, The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth College, Hanover, NH, US
2 College of Education and Human Development, Department of Health and Kinesiology, Texas A&M University, College Station, TX, US
*all authors contributed equally