Light smoking: dangerous in any dose.
D002318:Cardiovascular Diseases / Q000453:epidemiology / Q000517:prevention & control; D002386:Cataract / Q000453:epidemiology / Q000517:prevention & control; D015984:Causality; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D008171:Lung Diseases / Q000453:epidemiology / Q000517:prevention & control; D009042:Motivation; D009369:Neoplasms / Q000453:epidemiology / Q000517:prevention & control; D012309:Risk-Taking; D012907:Smoking / Q000453:epidemiology; D016540:Smoking Cessation / Q000706:statistics & numerical data*; D000074606:Smoking Prevention; D013959:Thyroid Diseases / Q000453:epidemiology / Q000517:prevention & control; D014481:United States