In the Original Investigation titled “Trastuzumab-Related Cardiotoxic Effects in Taiwanese Women: A Nationwide Cohort Study” published online June 16, 2016,1 a paragraph advertising Open Access was incorrectly published. This article was corrected online. This article was also corrected for typographical errors in the Incidence of HF and/or CM section of the Results, as well as an error in the key of Figure 1A, on October 13, 2016.2