Two of 85-year-old triplets developed Alzheimer's disease in their mid-70s and had long-standing obsessive-compulsive behavior but had similarly younger biological ages relative to their chronological ages as their sibling who didn't have Alzheimer's, while older biological age was found in a child of a triplet with Alzheimer's who also developed the disease, but not in another child of the same triplet without the disease, according to a study in the journal Brain. The findings suggest that genetics isn't exclusively correlated to Alzheimer's development, researchers said.
Study: Genes not exclusively associated with odds of Alzheimer's
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