A study by researchers at Mayo Clinic, Rochester Minn., and published in Mayo Clinic Proceedings, reveals that children who have been under anesthesia many times when they are young have a greater risk of developing attention-deficit/hyperactivity disorder (ADHD). According to David Warner, M.D, a Mayo Clinic pediatric anesthesiologist, and researchers of this study, kids who have been exposed to anesthesia more than twice before the age of 3 are twice as likely to have ADHD than children who have not been exposed...

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