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A fifty-five-year-old who is confused and depressed and learns that he carries two copies of the risk gene and stands an eighty-per-cent chance of getting Alzheimer’s might reach for a gun, which is the kind of scenario that some genetic counsellors worry about. - https://www.newyorker.com/tech/annals-of-technology/the-f-d-a-vs-personal-genetic-testing