About the Authors
School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, United Kingdom
Department of Zoology, University of Oxford, Oxford, United Kingdom
Molecular Pathogenesis and Genetics, Veterinary Laboratories Agency, Addlestone, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: BR RJE MBB. Performed the experiments: BR KLW. Analyzed the data: BR KLW SKS. Contributed reagents/materials/analysis tools: SKS. Wrote the paper: BR KLW SKS RJE MBB.