1. Department of Preventive Medicine, University of Southern California, Keck School of Medicine, Los Angeles2Department of Psychology, University of Southern California, Los Angeles
2. Department of Family Medicine and Public Health, University of California–San Diego School of Medicine, La Jolla
3. Department of Preventive Medicine, University of Southern California, Keck School of Medicine, Los Angeles
4. Department of Preventive Medicine, University of Southern California, Keck School of Medicine, Los Angeles2Department of Psychology, University of Southern California, Los Angeles4School of Social Work, University of Southern California, Los Angeles
5. Department of Human Development and Family Studies, Colorado State University, Fort Collins
6. Department of Psychiatry, University of Pennsylvania, Perelman School of Medicine, Philadelphia