About the Authors
Computational and Molecular Population Genetics Lab, Zoological Institute, University of Bern, Bern, Switzerland
Genetics and Biometry Laboratory, Department of Anthropology and Ecology, University of Geneva, Geneva, Switzerland
The authors have declared that no conflicts of interest exist.
MC and LE conceived and designed the experiments. MC performed the experiments. MC and LE analyzed the data. MC and LE wrote the paper.