[1] Univ North Carolina Chapel Hill, Dept Epidemiol, Chapel Hill, NC USA
[2] Michigan State Univ, Dept Psychol, E Lansing, MI USA
[3] Yale Univ, Ctr Child Study, New Haven, CT 06520 USA
[4] Univ Oregon, Prevent Sci Inst, Eugene, OR 97403 USA
[5] Univ Calif Riverside, Dept Psychol, Riverside, CA 92521 USA
[6] Univ Pittsburgh, Dept Psychol, Pittsburgh, PA 15260 USA
[7] George Washington Univ, Dept Psychol & Brain Sci, Washington, DC USA
[8] Penn State Univ, Dept Psychol, University Pk, PA 16802 USA