“…Adolescents experience symptoms of nicotine dependence (Centers for Disease Control, 1994;Colby et al, 2000;DiFranza et al, 2000DiFranza et al, ,2002Fergusson et al, 1996;Kandel et al, 2005;Karp et al, 2006;McNeill et al, 1986;Nelson and Wittchen, 1998;O'Loughlin et al, 2002O'Loughlin et al, ,2003O'Loughlin et al, ,2004Prokhorov et al, 1998Prokhorov et al, ,2001Prokhorov et al, ,2005Rojas et al, 1998;Sledjeski et al, 2007;Stanton, 1995), although crude rates of dependence are lower among adolescents than adults (Andreski and Breslau, 1993;Anthony et al, 1994;Heishman et al, 1997;Kandel, 2003;Kandel et al, 1997;Kandel and Chen, 2000). Age-specific comparisons based on cross-sectional samples document that rates increase rapidly throughout adolescence up to age 18 when they stabilize (Kandel, 2003;Nelson and Wittchen, 1998).…”