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# Competing interests  KJB participated in clinical trials supported by Psyadon Pharmaceuticals, Pharmaceuticals and  Neurocrine Biosciences, Inc., and Acadia Pharmaceuticals. Inc.  CAR and KJB have received research funding from the Tourette Association of America. # Grant information  This work was supported in part by the U.S. National Institutes of Health (NIH), grant R21 NS091635, and by a research grant from the Tourette Association of America to author CAR.