1. Department of Family Medicine and Population Health, Division of Epidemiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia (Mr Montgomery, Dr Lu, Mr Ratliff, Dr Mezuk)
2. Department of Epidemiology, University of Michigan, Ann Arbor, Michigan (Mr Ratliff, Dr Mezuk)
3. Institute for Social Research, University of Michigan, Ann Arbor, Michigan (Dr Mezuk)