About the Authors

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

Corresponding Author

senn@pyl.unibe.ch

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.