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British scientists have made a "major step forward" in developing a blood test to predict the onset of Alzheimer's disease. Research in more than 1,000 people has identified a set of proteins in the blood which can predict the start of the dementia with 87% accuracy. Dr Laura Phipps from Alzheimer's Research UK says a test could help develop better treatments for the condition. (Photo: A woman, suffering from Alzheimer's desease, holds the hand of a relative. Credit: SEBASTIEN BOZON/AFP/Getty Images)
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