In the May 1, 2006 issue of Biological Psychiatry, Volume 59, Issue 9, in the abstract and also the Efficacy section of the article “A Randomized, Placebo-Controlled Trial of OROS Methylphenidate in Adults with Attention-Deficit/Hyperactivity Disorder” by Biederman et al. (Biol Psychiatry 2006;59:829–835), it is reported that 39% (N = 23) of placebo subjects were responders. It should have been reported as 39% (N = 29).

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