 - Subjects who currently use or who have filled a prescription for ZYBAN, WELLBUTRIN, WELLBUTRIN SR, or WELLBUTRIN XL for smoking cessation within the previous 6 months. Note: Branded bupropion hydrochloride product use will be confirmed through a series of questions within the screener concerning manufacturer information detailed on the product label label on medication container and following a review of photographs of generic bupropion, ZYBAN, WELLBUTRIN, WELLBUTRIN SR or WELLBUTRIN XL tablet types online or via a paper copy sent with the invitation letter for those who choose to participate via phone 