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They sent David to a psychiatrist, who he saw until he was eighteen years old

Donaldson CD, Stupplebeen DA, Fecho CL, Ta T, Zhang X, Williams RJ

According to researchers from the USs Northwestern University Feinberg School of Medicine, it follows a sort of U-shaped curve, with a peak in young adulthood, a trough in midlife, then another rise after 60, becoming particularly steep around 80

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