The “route to quit” model, which indicates the contribution of different ways of quitting to overall rates of smoking cessation. #: in most cases nicotine replacement therapy was bought over the counter. The “route to quit” model, which indicates the contribution of different ways of quitting to overall rates of smoking cessation. #: in most cases nicotine replacement therapy was bought over the counter. R. West, and J. Stapleton Eur Respir Rev 2008;17:199-204 ©2008 by European Respiratory Society