9/6/2023 0 Comments Beat it down the line![]() The participants provided saliva samples at the outset to determine whether or not they had the APOE e4 variant, and just as expected, about one-quarter (26%) were found to have it. They selected 4,765 men and women, average age 72, all free of dementia, who had already participated in the Health and Retirement Study, a biennial survey of nationally representative older Americans, and followed them for four years.
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