About the Authors

Sandeep Krishna

Affiliation Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark

Sergei Maslov

Affiliation Department of Condensed Matter Physics and Material Sciences, Brookhaven National Laboratory, Upton, New York, United States of America

Kim Sneppen

To whom correspondence should be addressed. E-mail: sneppen@nbi.dk

Affiliation Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

SK, SM, and KS conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, and wrote the paper.