About the Authors

Johannes Friedrich, Robert Urbanczik, Walter Senn
Department of Physiology, University of Bern, Bern, Switzerland

Corresponding Author


Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RU WS. Performed the experiments: JF. Analyzed the data: JF. Contributed reagents/materials/analysis tools: JF RU. Wrote the paper: RU WS.