RT Journal Article SR Electronic A1 Rizzo, Tony T1 Two Years versus One Year of Trastuzumab in Patients with Early Breast Cancer JF MD Conference Express YR 2012 FD SAGE Publications VO 12 IS 15 SP 11 OP 12 DO 10.1177/155989771215007 UL http://mdc.sagepub.com/content/12/15/11.abstract AB The 2005 results of large randomized trials, including the Trastuzumab in Treating Women with Primary Breast Cancer [HERA; NCT00045032] trial, demonstrated statistically significant disease-free survival benefit for 1 year of treatment with trastuzumab compared with observation in patients with human epidermal growth factor receptor 2-positive early breast cancer. After 2005, the HERA trial focused on the secondary objective of comparing 2 years of trastuzumab treatment with 1 year of treatment, and this article discusses the results of this analysis.