School of Health Information Sciences, The University of Texas Health Science Center at Houston, 7000 Fannin Street, Suite 600, Houston, TX 77030, USA;Department of Medical Informatics & Clinical Epidemiology, Oregon Health & Science University, Portland, OR, USA;Division of General Internal Medicine, Department of Medicine, University of California, San Francisco, CA, USA;School of Library and Information Science, University of Iowa, Iowa City, IA, USA;Department of Surgery, Radiology and Computation Institute, University of Chicago, Chicago, IL, USA;School of Health Information Sciences, The University of Texas Health Science Center at Houston, Houston, TX, USA;Department of Biomedical Informatics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA