In the comment of the summary “Habit Reversal Training: A Treatment Option for Tourette Disorder,” published online June 9, 2010, reference to α-1 agonists should have been α-2 agonists as a treatment for Tourette disorder. The sentence should read as follows: “Few medications are approved for this indication by the FDA; those prescribed most frequently (atypical antipsychotics and α-2 agonists) are used off label.” We have corrected the error in our original summary, and we apologize for the error.