Errors in Text. In the Original Article by Birmaher et al titled “Clinical Course of Children and Adolescents With Bipolar Spectrum Disorders,” published in the February issue of the Archives (2006;63:175-183), errors occurred in the text on pages 176 and 179. On page 176, in the “Methods” section, “Subjects” subsection, fifth paragraph, the third sentence should have read as follows: “Subjects with BP-II had the onset of their mood disorders significantly later and had significantly lower rates of comorbid attention-deficit/hyperactivity disorder than subjects with BP-I and BP-NOS (P≤.05).” On page 179, under “Weekly Mood Symptomatic Status by BP Subtype,” first paragraph, the second sentence should have read as follows: “Within the syndromal symptoms, subjects with BP-I spent significantly more weeks with syndromal mania and mixed symptoms than those with BP-NOS, and subjects with BP-II spent significantly more time with depressive symptoms than those with BP-I and BP-NOS (all comparisons, P≤.001).”