The May 10, 2019, article by Turner et al entitled “Cyclin E1 Expression and Palbociclib Efficacy in Previously Treated Hormone Receptor–Positive Metastatic Breast Cancer” (J Clin Oncol 10.1200/JCO.18.00925) was published with an error.
Coauthor Marco Colleoni was listed with the incorrect affiliation. In the Affiliations section, the fourth affiliation note was given as: 4Istituto Europeo di Oncologia, Milan, Italy
It should have read as: 4The Division of Medical Senology, IEO, European Institute of Oncology, IRCCS, Milan
This has been corrected as of September 16, 2019. The authors apologize for the error.