“…Furthermore, the extent to which an individual adheres to smoking cessation treatment medications has also been shown to be a critical factor in determining successful cessation among smokers (Blak, Wilson, Metcalfe, Maguire, & Hards, 2010, Catz et al, 2011, Cummings, Hyland, Ockene, Hymowitz, & Manley, 1997, Halperin et al, 2009, Lam, Abdullah, Chan, & Hedley, 2005, Piper et al, 2009Shiffman, Sweeney, Ferguson, Sembower, & Gitchell, 2008). In studies of MMT smokers, poor medication adherence has been identified as a significant barrier to successfully quitting Mooney et al, 2008;Richter et al, 2001;Stein et al, 2006Stein et al, , 2007.…”