About the Authors

Richard P. Mann

rmann@math.uu.se

Affiliation Centre for Interdisciplinary Mathematics, Uppsala University, Uppsala, Sweden

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

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