1. Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, Maryland, USA
2. Genomic Medicine Service, Veterans Administration Central Office, Salt Lake City, Utah, USA
3. Health, Behavior, and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
4. Human Development and Family Studies, University of Connecticut, Storrs, Connecticut, USA
5. Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
6. Kimmel Cancer Center, Johns Hopkins School of Medicine, Baltimore, Maryland, USA