About the Authors

Barry Nicholls

To whom correspondence should be addressed. E-mail: b.nicholls@abdn.ac.uk

Affiliation School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom

Paul A. Racey

Affiliation School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PR. Performed the experiments: BN. Analyzed the data: BN. Wrote the paper: BN.