Published on in Vol 6 , No 9 (2018) :September

1 Division of General Medicine & Clinical Epidemiology , Department of Medicine , University of North Carolina School of Medicine , Chapel Hill , NC , US
2 Division of General Pediatrics and Adolescent Medicine , Department of Pediatrics , University of North Carolina School of Medicine , Chapel Hill , NC , US
3 Carolina Health Informatics Program , University of North Carolina at Chapel Hill , Chapel Hill , NC , US
4 Program on Health and Clinical Informatics , University of North Carolina School of Medicine , Chapel Hill , NC , US
5 School of Information and Library Science , University of North Carolina at Chapel Hill , Chapel Hill , NC , US
*these authors contributed equally