Strengths and limitations of this study This casecontrol study explores an easily identifiable and frequent clinical sign among smokers and appreciates the additional risk for health due to tar deposition (influenced by puffing or cigarette characteristics) not included in the usual measure of tobacco exposure (pack-year)
Picture what your life could look like without nicotine
Quitting reduces the risk of 12 cancers: leukaemia, bladder, lung cancer, cervix, colon and rectum, oesophagus, kidney, liver, mouth and throat, pancreas, stomach and voice box (larynx)
Bankrolled by the country's two biggest cigarette companies, they swarmed the halls of the state capitol, wined and dined Republican leaders, launched a sophisticated call-in campaign and coached witnesses for hearings