1. Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Victoria, Australia
2. Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany
3. WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Victoria, Australia
4. Institute of Medical Biometry, Informatics and Epidemiology, University Hospital Bonn, Bonn, Germany
5. Institute for Genomic Statistics and Bioinformatics, University Hospital Bonn, Bonn, Germany