In the article "PET Studies of the Influences of Nicotine on Neural Systems in Cigarette Smokers," by Jed E. Rose, Ph.D., et al. (February 2003; 160:323–333), the graph shown in Figure 3 (p. 329, second column) is incorrect. The correct F3 is shown below. (The online version of the this article at http://ajp.psychiatryonline. org was corrected before publication of this erratum.)