1. Department of Epidemiology; University of Alabama at Birmingham; Birmingham Alabama USA
2. Comprehensive Cancer Center; University of Alabama at Birmingham; Birmingham Alabama USA
3. Department of Epidemiology; University of Kentucky; Lexington Kentucky USA
4. Division of Preventive Medicine, School of Medicine; University of Alabama at Birmingham; Birmingham Alabama USA
5. Department of Biostatistics; University of Alabama at Birmingham; Birmingham Alabama USA
6. Department of Epidemiology; Emory University Rollins School of Public Health; Atlanta Georgia USA
7. Department of Medicine; Weill Cornell Medical College; New York New York USA
8. Department of Clinical Cancer Prevention and Cardiology; The University of Texas MD Anderson Cancer Center; Houston Texas USA.