About the Authors

Michał J Okoniewski
Crispin J Miller

To whom correspondence should be addressed. E-mail: cmiller@picr.man.ac.uk

Competing Interests

The authors have declared that there are no competing interests.

Author Contributions

CJM conceived and designed and performed the experiments, analyzed the data, contributed reagents/materials/analysis/tools, and wrote the paper. MJO performed the experiments, analyzed the data, and contributed reagents/materials/analysis/tools.