Impact of Graphic Cigarette Warnings

"Participants will be randomly assigned to receive warnings with one of the four Surgeon General's Warnings on their cigarette packs for 4 weeks:~1. SURGEON GENERAL'S WARNING: Smoking Causes Lung Cancer, Heart Disease, Emphysema, and May Complicate Pregnancy.~2. SURGEON GENERAL'S WARNING: Quitting Smoking Now Greatly Reduces Serious Risks to Your Health.~3. SURGEON GENERAL'S WARNING: Smoking by Pregnant Women May Result in Fetal Injury, Premature Birth, and Low Birth Weight.~4. SURGEON GENERAL'S WARNING: Cigarette Smoke Contains Carbon Monoxide."

"Participants will be randomly assigned to receive one of the following four graphic warnings on their cigarette packs for 4 weeks:~1. Text: WARNING: Cigarettes are addictive. Image: Man smoking through tracheotomy hole.~2. Text: WARNING: Cigarettes causes fatal lung disease. Image: Healthy lungs next to diseased lungs.~3. Text: WARNING: Cigarettes cause cancer. Image: Mouth with cancerous lesion on lip.~4. Text: WARNING: Smoking can kill you. Image: Woman dying from cancer."