1. Department of Epidemiology and Injury Prevention Research Center, University of North Carolina, Chapel Hill, and School of Public Health, University of California, Berkeley, Prevention Research Center, Oakland, California;, Email:
rebeccayau@unc.edu
2. Department of Epidemiology, Injury Prevention Research Center, and Thurston Arthritis Research Center, University of North Carolina, Chapel Hill
3. Department of Epidemiology, University of North Carolina, Chapel Hill
4. Department of Psychiatry, University of North Carolina, Chapel Hill, and Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, California
5. Carolina Center for Health Informatics, University of North Carolina, Chapel Hill
6. Department of Epidemiology and Injury Prevention Research Center, University of North Carolina, Chapel Hill