1. Centre for Virology, Department of Infection, University College London, London, UK.
2. Department of Virology, UCL Hospitals NHS Foundation Trust, London, UK.
3. Centre for Infectious Diseases and International Health, University College London, London, UK.
4. Barts and the London Queen Mary's School of Medicine and Dentistry, London, UK.
5. Physiology Weihenstephan, Technical University of Munich, Munich, Germany.
6. Genomics Core Facility, European Molecular Biology Laboratory, Heidelberg, Germany.
7. Centre for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.
8. Quantitative Genomics Core Laboratory, The University of Texas Health Science Center, Houston, Texas.