About the Authors

Debra C. Archer

darcher@liv.ac.uk

Affiliation Institute of Infection and Global Health/School of Veterinary Science, University of Liverpool, Leahurst Campus, Neston, United Kingdom

Deborah A. Costain

Affiliation Department of Mathematics and Statistics, Lancaster University, Lancaster, United Kingdom

Chris Sherlock

Affiliation Department of Mathematics and Statistics, Lancaster University, Lancaster, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DCA DAC CS. Analyzed the data: DAC CS. Contributed reagents/materials/analysis tools: DCA. Wrote the paper: DCA DAC CS.