Table 2 in the article "Pharmacogenetic Approach at the Serotonin Transporter Gene as a Method of Reducing the Severity of Alcohol Drinking" by Bankole A. Johnson, D.Sc., M.D., et al. (Am J Psychiatry 2011;168:265—275) contained errors in the clinical data. With respect to baseline self-reported percentage of days abstinent, the numbers should have read as follows (from left to right): 18.0, 22.5, 15.0, 18.2, 22.3, 22.6, 13.7, 18.1, 11.2, 12.3, 19.8, 22.3, 13.6, 13.7, 18.1, and 22.1.

Also, the mean (SD) revised Clinical Institute Withdrawal Assessment for Alcohol scale score values in the placebo TT column were transposed with the mean (SD) values in the placebo TG/GG column.The mean (SD) Alcohol Use Disorders Identification Test score values in the ondansetron TT column were transposed with the mean (SD) values in the ondansetron TG/GG column. The mean value for age at alcoholism onset in the ondansetron TT column should have read 28.8 instead of 38.8. Finally, the mean values for social class in the placebo TT column should have read 21, 20, and 2 for social classes 1—3, 4—6, and 7—9, respectively, instead of 41, 36, and 4. A reproduction of the table as it should have appeared is presented below (changes denoted in red).