Quitting smoking.
D001521:Behavior Therapy; D005731:Ganglionic Stimulants / Q000627:therapeutic use; D006801:Humans; D009042:Motivation; D009538:Nicotine / Q000627:therapeutic use; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*; D016540:Smoking Cessation / Q000379:methods*; D012944:Social Support
D005731:Ganglionic Stimulants; D009538:Nicotine