About the Authors
Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
Ontario Institute for Cancer Research, Toronto, Ontario, Canada
Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: BZ MB. Performed the experiments: JJ BZ SHH. Analyzed the data: JJ TEWO BZ. Wrote the paper: JJ TEWO MB.