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This drives ongoing smoking even among people who may desire to quit.11 Quitting smoking increases life expectancy and improves mental health and quality of life.12 , 13 Behavioural interventions to promote smoking cessation may include brief advice from a health care provider of a few minutes or less

Amyloid plaques and tau tangles are widespread in Alzheimers and physically change the brain

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A 20 pack years of smoking history means smoking one pack of cigarettes per day for 20 years, smoking two packs for 10 years, or any other pack-year combination that multiplied gives twenty