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  1. What is ADHD? | CDC - Centers for Disease Control and Prevention

  2. Attention-deficit/hyperactivity disorder (ADHD) in children

  3. Attention deficit hyperactivity disorder - Wikipedia

  4. Adult attention-deficit/hyperactivity disorder (ADHD)

  5. ADHD: Symptoms, Types, Testing, and Treatment - WebMD

  6. Attention-Deficit/Hyperactivity Disorder - National Institute of …

  7. Learn About Attention-Deficit / Hyperactivity Disorder (ADHD)

  8. Psychiatry.org - What is ADHD?

  9. ADHD (Attention Deficit Hyperactivity Disorder): What Is It? - Healthline

  10. Symptoms and Diagnosis of ADHD | CDC