About the Authors
Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland
School of Life Sciences, Federal Institute of Technology, 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: JMW DN DD. Performed the experiments: JMW DN ML. Analyzed the data: JMW DN ML DD. Wrote the paper: JMW DD.