A doctor points to PET scan results that are part of Alzheimer's disease research.Much work in the field focuses a substance called beta-amyloid.A new study could test whether that's the right target.Evan Vucci/AP An idea that has propelled Alzheimer's research for more than 30 years is approaching its day of reckoning.
#people #years #responsible #researchers #fortunately #past-decade #older-people #clinical-trials #alzheimers-disease
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