From the Centers for Disease Control and Prevention. Reasons for tobacco use and symptoms of nicotine withdrawal among adolescent and young adult tobacco users--United States, 1993.
D000293:Adolescent; D000294:Adolescent Behavior; D000328:Adult; D017677:Age Distribution; D006801:Humans; D009538:Nicotine / Q000009:adverse effects; D010947:Plants, Toxic; D012907:Smoking / Q000453:epidemiology / Q000523:psychology*; D013375:Substance Withdrawal Syndrome / Q000503:physiopathology; D019966:Substance-Related Disorders; D014030:Tobacco, Smokeless / Q000009:adverse effects; D014481:United States
D009538:Nicotine