About the Authors
Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
The Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: CJ GC FG. Performed the experiments: CJ GC EM FA FG. Analyzed the data: LS FN FG. Wrote the paper: FG FN.