Erratum: “Multicenter Independent Assessment of Outcomes in Chronic Myeloid Leukemia Patients Treated with Imatinib” by Gambacorti-Passerini et al. J Natl Cancer Inst 2011; 103(7): 553–61 . One of the article’s co-authors, Rocco Piazza, was omitted from the author list. The author list should read, “Carlo Gambacorti-Passerini, Laura Antolini, François-Xavier Mahon, Francois Guilhot, Michael Deininger, Carmen Fava, Arnon Nagler, Chiara Maria Della Casa, Enrica Morra, Elisabetta Abruzzese, Anna D’Emilio, Fabio Stagno, Philipp le Coutre, Rafael Hurtado-Monroy, Valeria Santini, Bruno Martino, Fabrizio Pane, Andrea Piccin, Pilar Giraldo, Sarit Assouline, Muheez A. Durosinmi, Onno Leeksma, Enrico Maria Pogliani, Miriam Puttini, Eunjung Jang, Josy Reiffers, Rocco Piazza, Maria Grazia Valsecchi, and Dong-Wook Kim.” The authors regret the error.