About the Authors

Steven J. Lade, Thilo Gross
Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

Corresponding Author

slade@pks.mpg.de

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Wrote the paper: SJL TG. Designed the research: SJL TG. Performed the research: SJL.