Complex sentence: There are several common childhood precursors seen in children who later receive a diagnosis of bipolar disorder; these include mood abnormalities, full major depressive episodes, and Attention Deficit Hyperactivity Disorder (ADHD).
Split into simpler sentences: There are several common childhood precursors seen in children who later receive a diagnosis of bipolar disorder. These include mood abnormalities, full major depressive episodes, and Attention Deficit Hyperactivity Disorder (ADHD).