Published on in Vol 20, No 6 (2018): June
1 Department of Family Medicine & Public Health, University of California, San Diego, La Jolla, CA, United States
2 School of Nutrition & Health Promotion, Arizona State University, Phoenix, AZ, United States
3 School for Engineering of Matter, Transport, and Energy, Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, AZ, United States
4 3Escuela Superior Polit ́ecnica del Litoral, ESPOL, Guayaquil, Ecuador
5 Kaiser Permanente Washington Health Research Institute, Seattle, WA, United States
6 School of Information, University of Michigan, Ann Arbor, MI, United States