1. Institute of Evolutionary Biology, Ashworth Laboratories, School of Biological Sciences University of Edinburgh Edinburgh EH9 3JT United Kingdom
2. Institut de Biologie de l'Ecole Normale Supérieure, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, École Normale Supérieure Paris Sciences et Lettres 75005 Paris France
3. MRC London Institute of Medical Sciences London W12 0NN United Kingdom
4. Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm Institute of Biology Valrose 06108 Nice France
5. Department of Biology New York University New York New York 10003
6. Center for Genomics and Systems Biology, Department of Biology New York University New York New York 10003
7. Molecular Virology, Department of Medicine Imperial College London Du Cane Road London W12 0NN United Kingdom
8. Institut für Biologie/Zoologie Freie Universität Berlin Berlin D‐14195 Germany