A study in the US has found that smoking increases the risk of breast cancer in older women by almost 20%.
The study adds to a growing weight of evidence linking exposure to tobacco smoke and deadly disease.
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There was an "alarming" increase in the number of death sentences issued around the world last year, Amnesty International has said.
Paracetamol is ineffective at treating back pain, Australian researchers say.
Madonna says she still cannot bring herself to watch footage of the moment she fell on stage while performing at the Brit Awards.