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Significantly decreased white matter connectivity in youth with ADHD who were COMT Met‐carriers compared to those who were Val‐homozygous. A single abnormal network was identified (t = 2). ADHD, attention‐deficit/hyperactivity disorder; COMT, catechol‐O‐methyltransferase; L, left; R, right. [Color figure can be viewed in the online issue, which is available at http://wileyonlinelibrary.com.]
