1. Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University , Portland, Oregon, USA
2. Division of Health Science Informatics, Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland, USA
3. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina, USA
4. Division of Cancer Epidemiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina, USA