Younger children in a school grade cohort may be more likely to receive a diagnosis of attention deficit–hyperactivity disorder (ADHD) than their older peers because of age-based variation in behavior that may be attributed to ADHD rather than to the younger age of the children. Most U.S. states have arbitrary age cutoffs for entry into public school. Therefore, within the same grade, children with birthdays close to the cutoff date can differ in age by nearly 1 year.
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Error: Error validating access token: The session has been invalidated because the user changed their password or Facebook has changed the session for security reasons.
Type: OAuthException
Subcode: 460
Type: OAuthException
Subcode: 460