1. Prevention Research Center, Pennsylvania State University, University Park, Pennsylvania
2. Department of Medicine, University of California, Los Angeles, Los Angeles, California
3. School of Public Health, University of Maryland, College Park, Maryland
4. Department of Family Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia
5. Department of Human Development and Family Sciences, Texas State University, San Marcos, Texas
6. School of Social Work, University of Texas, Arlington, Arlington, Texas
7. Department of Family Medicine and Community Health, University of Minnesota, Minneapolis, Minnesota