The information you provide in the Tobacco Treatment Program (TTP) questionnaires regarding anxiety, depression, alcohol use, sleeping difficulties, smoking withdrawal symptoms, nicotine dependence and smoking will be used for this study, so that you do not have to fill out these questionnaires twice. Physical data that you provided to the TTP (such as breath samples, blood pressure, heart rate and weight) will also be used in this study, so that it does not have to be collected twice.