1. Influenza Division, National Center for Immunization and Respiratory Diseases; Centers for Disease Control and Prevention; Atlanta GA USA
2. Department of Pathology; University of Cambridge; Cambridge UK
3. Helmholtz Zentrum München; Institute of Molecular Immunology; Munich Germany
4. Department of Medicine; McGill University; Montreal Canada
5. Department of Immunology; Institute of Nutritional Medicine; University of Hohenheim; Stuttgart Germany