Scientists from Oxford have released new research claiming that women who smoked about 20 cigarettes a day doubled their risks of contracting Hodgkin's lymphoma and some bone marrow cancers.
The results come from a study of more than a million middle-aged women funded by Cancer Research UK and the Medical Research Council.
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Friday night's forecast for the west of the region
Friday night's forecast for the east of the region
Friday afternoon's forecast for the east of the region