Published on in Vol 16, No 7 (2014): July
1 Division of Health and Biomedical Informatics, Department of Preventive Medicine, Northwestern University, Chicago, IL, United States
2 Global Institute of Public Health, New York University, New York, NY, United States
3 School of Nursing, Columbia University, New York, NY, United States
4 Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, United States
5 Intermountain Healthcare, Murray, UT, United States
6 Department of Biomedical Informatics, Columbia University, New York, NY, United States
*all authors contributed equally