1. Department of Epidemiology and Community Health, Virginia Commonwealth University, Richmond, VA, USA
2. Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA, USA
3. Institute for Social Research, University of Michigan, Ann Arbor, MI, USA
4. Leonard Davis School of Gerontology, Department of Psychology, University of Southern California, Los Angeles, CA, USA
5. The Brown School, Washington University–St. Louis, St. Louis, MO, USA
6. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
7. Department of Sociology, University of Washington, Seattle, WA, USA