> Smoking has been associated with many psychological symptoms and psychiatric disorders (Hughes 1999; Kalman et al. 2005). One explanation of this association has been that those destined to become smokers have pre-existing or “latent” psychiatric or psychological problems and use nicotine to “self-medicate” to abate these (Markou & Kenny 2002). Several epidemiological and biological lines of evidence support this hypothesis (Markou & Kenny 2002).<p>Find that hard to believe. Thoughts?