1. Department of Psychology; Georgia State University; Atlanta GA USA
2. Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion; US Centers for Disease Control and Prevention; 4770 Buford Highway, NE, Mailstop K51 30331-3717 Atlanta GA USA
3. EMSTAR Research, Inc.; Atlanta GA USA
4. Institute of Public Health, Georgia State University; Atlanta GA USA