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Concentrations decline sharply with age: plasma levels drop from roughly 200 ng/mL at age 20 to under 80 ng/mL by age 60
Wollenhaupt-Aguiar B, Kapczinski F, Pfaffenseller B
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10.1038/s41586-020-2502-7 Nature 19 CaiQ.DozmorovM.OhY
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