Dr. Karen Ashe, of the University of Minnesota, has been trying to unravel the mysteries of Alzheimer's disease for 20 years. Now she hopes to find a way to prevent it. | More Info

A race against time

Dr. Karen Ashe, of the University of Minnesota, has been trying to unravel the mysteries of Alzheimer's disease for 20 years. Now she hopes to find a way to prevent it.

A race against time

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