In the article titled “Comparative Safety of Testosterone Dosage Forms,” published online May 11, 2015, and also in this issue of JAMA Internal Medicine (doi:10.1001/jamainternmed.2015.1573), incorrect information appeared in the Abstract. In the Design, Setting, and Participants portion, the second sentence, which read “Participants included 13 men (aged ≥18 years) who initiated use of testosterone patches, gels, or 14 injections following 180 days with no testosterone use.” should be replaced with the following: “Participants included men (aged ≥18 years) who initiated use of testosterone patches, gels, or injections following 180 days with no testosterone use.” This article was corrected online and in print.