About the Authors

Wei Liu

wl08r@ecs.soton.ac.uk

Affiliation School of Electronics and Computer Science, University of Southampton, Southampton, United Kingdom

Mahesan Niranjan

Affiliation School of Electronics and Computer Science, University of Southampton, Southampton, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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