About the Authors

Sam Walcott

swalcott@math.ucdavis.edu

Affiliation Mathematics, University of California at Davis, Davis, California, United States of America

Neil M. Kad

Affiliation School of Biosciences, University of Kent, Canterbury, Kent, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SW NMK. Performed the experiments: SW. Analyzed the data: SW. Contributed reagents/materials/analysis tools: SW NMK. Wrote the paper: SW NMK.