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Y_Kistochka [10]
3 years ago
15

What can cause attention deficit hyperactivity

Biology
1 answer:
Darya [45]3 years ago
8 0
<span>Symptoms. The primary features of attention-deficit/hyperactivity disorder include inattention and hyperactive-impulsive behavior. ADHD symptoms start before age 12, and in some children, they're noticeable as early as 3 years of age. ADHD symptoms can be mild, moderate or severe, and they may continue into adulthood.</span>
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