“…Although craving and cognitive impairments are reliable markers of nicotine withdrawal (Kenney and Gould, 2008;Levin et al, 2006;McClernon et al, 2004;Rezvani and Levin, 2001), anxiety has been shown to impact relapse rate as well (Dani and Harris, 2005;DiMatteo et al, 2000). Furthermore, nicotine withdrawal itself induces an increased anxiety state in both human (Dani et al, 2005;Hogle et al, 2010;Picciotto et al, 2002;Piper et al, 2011;Pomerleau et al, 2005) and animal models (Costall et al, 1989;Irvine et al, 2001;Jackson et al, 2008Jackson et al, , 2009Jonkman et al, 2005;Stoker et al, 2008). A recent functional imaging study in smokers correlated affect with aberrant activation in the hippocampus during smoking cue presentation (McClernon et al, 2008).…”