About the Authors

Xuhua Xia

To whom correspondence should be addressed. E-mail: xxia@uottawa.ca

Affiliation Department of Biology, University of Ottawa, Ottawa, Canada

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XX. Performed the experiments: XX. Analyzed the data: XX. Contributed reagents/materials/analysis tools: XX. Wrote the paper: XX.