Correction

The lead author of a research paper¹ in the April 8 issue has provided the following clarification. The initial Health Canada warnings about the use of antidepressants were directed toward people aged 18 years and younger; however, in June 2004, Health Canada expanded their warning to include all age groups. The implication of this omission for the study by Katz and colleagues is that the decrease in antidepressant use among young adults (19–24 years) is not a “spillover” effect but rather is a measure of the impact of the warning on young adults. The other events described in this study as “spillover effects” are accurately described.