About the Authors
Institute of Physiology, Ludwig-Maximilians University, Munich, Germany
Department of Anaesthesiology, Ludwig-Maximilians University, Munich, Germany
The authors have declared that no competing interests exist.
Conceived and designed the experiments: RWC PG. Performed the experiments: RWC RS PG. Analyzed the data: RWC. Wrote the paper: RWC RS PG. Informed patients and collected material from surgery: RS.