About the Authors

Melissa S McMahill

Affiliations Committee on Genetics, University of Chicago, Chicago, Illinois, United States of America , Department of Radiation and Cellular Oncology, University of Chicago, Chicago, Illinois, United States of America

Caroline W Sham

Affiliation Department of Radiation and Cellular Oncology, University of Chicago, Chicago, Illinois, United States of America

Douglas K Bishop

To whom correspondence should be addressed. E-mail: dbishop@uchicago.edu

Affiliations Committee on Genetics, University of Chicago, Chicago, Illinois, United States of America , Department of Radiation and Cellular Oncology, University of Chicago, Chicago, Illinois, United States of America , Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

MSM and DKB conceived and designed the experiments and wrote the paper. MSM, CWS, and DKB performed the experiments, analyzed the data, and contributed reagents/materials/analysis tools.