PLoS ONE plos plosone PLOS ONE 1932-6203 Public Library of Science San Francisco, CA USA 10.1371/journal.pone.0175869 PONE-D-17-13014 Retraction Medicine and health sciencesOncologyCarcinogenesisMedicine and health sciencesOncologyCancers and neoplasmsBreast tumorsBreast cancer Retraction: miR-221 Promotes Tumorigenesis in Human Triple Negative Breast Cancer Cells The PLOS ONE Editors 10 4 2017 2017 12 4 e0175869 2017 The PLOS ONE Editors This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. miR-221 Promotes Tumorigenesis in Human Triple Negative Breast Cancer Cells

The authors Min-Jean Yin and Rounak Nassirpour and a Pfizer representative contacted the editorial office to raise that there are image duplications in Figure 4B of this article. Pfizer has undertaken a review and deemed that important conclusions in the manuscript cannot be verified, as original images cannot be located.

In light of the concerns identified, the authors and the PLOS ONE Editors retract this article. We did not receive any response or comment from Pramod Mehta.

Reference Nassirpour R, Mehta PP, Baxi SM, Yin M-J (2013) miR-221 Promotes Tumorigenesis in Human Triple Negative Breast Cancer Cells. PLoS ONE 8(4): e62170. doi:10.1371/journal.pone.0062170 23637992