MAIL ONLINE: Oestrogen-blocking drug that halves the risk of breast cancer in post-menopausal women 'works for SEVEN YEARS after they stop taking it'

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Professor Tony Howell, of the University of Manchester, who was involved in the study said: 'Importantly, this study shows there are no significant long term side-effects in the five years after completion of anastrozole, particularly no increase in fractures or heart disease.'