About the Authors

Karen M. Bussard
Gilbert H. Smith

gs4d@nih.gov

Affiliation Mammary Biology and Tumorigenesis Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KB GHS. Performed the experiments: KB. Analyzed the data: KB GHS. Wrote the paper: KB.