| Jonathan A C Sterne | Bristol Medical School, University of Bristol |
| Roger D Kouyos | Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, Switzerland Institute of Medical Virology, University of Zurich |
| Roger D Kouyos | Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, Switzerland Institute of Medical Virology, University of Zurich |