Tobacco smoking continues to be a serious public health problem. The proportion of United States (US) adults who are current cigarette smokers remains high; approximately 20% of the population continues to smoke despite the public health efforts to reduce tobacco use (CDC, 2009). Smoking is known to be associated with significant morbidity and mortality by causing 443,000 premature deaths and costing $193 billion in direct health-care and productivity loss every year in the US (CDC, 2008). In addition, smoking co-occurs with many mental disorders.
