Incorrect Units: In the Special Communication titled “Treating Drug Abuse and Addiction in the Criminal Justice System: Improving Public Health and Safety,” published in the January 14, 2009, issue of JAMA (2009;301[2]:183-190), data were reported with incorrect units on page 185. The cost of incarceration should have been reported as $22 000 per year rather than per month; likewise, the average cost of methadone should have been reported as $4000 per year rather than per month.