About the Authors

Masahiro Yamashita

Affiliation Division of Human Biology and Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Michael Emerman

To whom correspondence should be addressed. E-mail: memerman@fhcrc.org

Affiliation Division of Human Biology and Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

MY and ME conceived and designed the experiments. MY performed the experiments. MY and ME analyzed the data. MY contributed reagents, materials, and analysis tools. MY and ME wrote the paper.