Genetic Associations with Regular Smoking among Adolescents: The Social Environment as a Fundamental Cause • Jason D. Boardman, University of Colorado at Boulder ; Brett Haberstick, University of Colorado at Boulder ; David Timberlake, University of Colorado at Boulder ; Jeffrey Lessem, University of Colorado at Boulder ; Marissa Ehringer, University of Colorado at Boulder ; Andrew Smolen, University of Colorado at Boulder ; Christian Hopfer, University of Colorado at Boulder ; John Hewitt, University of Colorado at Boulder

Stress-Adaptive Survival and Longevity Effects of Tumor Suppressor Mutation: Population Modeling with lgl Gene in Drosophila • Michael Golubovsky, Duke University ; Nataly Weisman, Russian Academy of Sciences

Age at First Sexual Intercourse, Genes, and Social & Demographic Context: Evidence from Twins and the Dopamine D4 Receptor Gene • Guang Guo, University of North Carolina at Chapel Hill ; Yuying Tong, University of North Carolina at Chapel Hill

Rates of Aging, APOE Genotypes, and Cause-Specific Mortality in the Cache County Study • Ken R. Smith, University of Utah ; Kathleen Hayden, Duke University ; Geraldine P. Mineau, University of Utah ; Richard Kerber, Huntsman Cancer Institute