About the Authors

Pengsheng Zheng

Affiliation Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany

Christos Dimitrakakis

Affiliation Ėcole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

Jochen Triesch

triesch@fias.uni-frankfurt.de

Affiliation Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PZ JT. Performed the experiments: PZ. Analyzed the data: PZ CD. Wrote the paper: JT PZ.