 This study is a clinical trial of team-based financial incentives for smoking cessation among a sample of 60 smokers, who are health care workers from St. Pauls Hospital in Korea. Smokers will be given a usual care counseling, education and coverage of prescription drugs plus a package of financial incentives for self-reported and biochemically validated smoking cessation urine or saliva cotinine. All incentives will be provided to each team at 6 months post-quit date. 