About the Authors

John Withers

Affiliation Howard Hughes Medical Institute-Gordon and Betty Moore Foundation, Department of Biology, Duke University, Durham, North Carolina, United States of America

Xinnian Dong

xdong@duke.edu

Affiliation Howard Hughes Medical Institute-Gordon and Betty Moore Foundation, Department of Biology, Duke University, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.