1. Department of Pathology, Division of Virology, University of Cambridge, Cambridge, United Kingdom
2. MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
3. Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
4. The Francis Crick Institute, London, United Kingdom
5. Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich, United Kingdom
6. Pirbright Institute, Pirbright, Woking, United Kingdom
7. CNRS-Université Paris Diderot, Institut de Biologie Physico-Chimique, Paris, France
8. University of California at Santa Cruz, Santa Cruz, California, USA