About the Authors
Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts, United States of America
Department of Cancer Biology, Dana Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: IZ LY VT. Performed the experiments: IZ LY VT. Analyzed the data: IZ LY VT. Contributed reagents/materials/analysis tools: SK. Wrote the paper: IZ LY VT