This fact sheet is part of the National Cancer Institute's Cancer Facts series. It gives an overview of the relationship between cigarette smoking and lung cancer and explains that additional information and resources may be obtained from the Office on Smoking and Health.

Quitnet.com is a free online smoking cessation program. From their website users can create their own quit plan, ask expert counselors questions, find support from the QuitNet community, and learn from quitting and medication guides.