Then the investigators test the effect of the smoking cessation program in a randomised controlled trial. All hospitals in the Capital Region of Denmark except one are included (the last hospital is situated on a remote island). Half of the hospitals are randomised to be intervention group and the other half is control group. Recruitment will be by written invitations, posters and primarily by peer-recruitment (smokers with low education who are ambassadors for the project at the work places). Posters and written invitations show photos of the ambassadors in the target group and their statements; why they have decided to quit smoking.