About the Authors

Marek Cieplak

Contributed equally to this work with: Marek Cieplak, Mark O. Robbins

mc@ifpan.edu.pl

Affiliation Institute of Physics, Polish Academy of Sciences, Warsaw, Poland

Mark O. Robbins

Contributed equally to this work with: Marek Cieplak, Mark O. Robbins

Affiliation Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: MC MOR. Wrote the paper: MC MOR.