About the Authors
Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JS. Performed the experiments: LL CG JS. Analyzed the data: RNE JS. Contributed reagents/materials/analysis tools: JS. Wrote the paper: JS.