[1] Univ Penn, Adolescent Risk Commun Inst, Annenberg Publ Policy Ctr, Philadelphia, PA 19104 USA
[2] Rhode Isl Hosp, Bradley Hasbro Res Ctr, Providence, RI USA
[3] Emory Univ, Rollins Sch Publ Hlth, Atlanta, GA 30322 USA
[4] Univ S Carolina, Arnold Sch Publ Hlth, Columbia, SC 29208 USA
[5] Syracuse Univ, Dept Psychol, Syracuse, NY USA
[6] Syracuse Univ, Ctr Hlth & Behav, Syracuse, NY USA
[7] Wayne State Univ, Dept Pediat, Childrens Hosp Michigan, Detroit, MI 48202 USA