About the Authors

Ken Dawson-Scully

Affiliation University of Toronto, Department of Biology, Mississauga, Ontario, Canada

Gary A. B. Armstrong

Affiliation Queen's University, Department of Biology, Kingston, Ontario, Canada

Clement Kent

Affiliation University of Toronto, Department of Biology, Mississauga, Ontario, Canada

R. Meldrum Robertson

Affiliation Queen's University, Department of Biology, Kingston, Ontario, Canada

Marla B. Sokolowski

To whom correspondence should be addressed. E-mail: msokolow@utm.utoronto.ca

Affiliation University of Toronto, Department of Biology, Mississauga, Ontario, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MS CK KD GA RR. Performed the experiments: KD GA. Analyzed the data: MS CK KD GA RR. Contributed reagents/materials/analysis tools: MS KD GA RR. Wrote the paper: MS KD RR.