1. Department of Medical Informatics and Clinical Epidemiology, School of Medicine, Oregon Health & Science University, Portland, Oregon, United States
2. Department of Urban Studies, Barry Commoner Center for Health and the Environment, Queens College, City University of New York, New York, New York, United States
3. National Institute for Occupational Safety and Health/Centers for Disease Control and Prevention, Cincinnati, Ohio and Morgantown, West Virginia, United States
4. Yale Center for Medical Informatics, Yale University School of Medicine, New Haven, Connecticut, United States