1. Department of Paediatrics, Second Faculty of Medicine Charles University and University Hospital Motol Prague Czech Republic
2. Department of Paediatrics, Faculty of Medicine Masaryk University and University Hospital Brno Brno Czech Republic
3. Central European Institute of Technology Masaryk University Brno Czech Republic
4. Department of Paediatrics, Faculty of Medicine Palacky University and University Hospital Olomouc Olomouc Czech Republic
5. National Reference Laboratory for Influenza and Respiratory Viruses National Institute for Public Health Prague Czech Republic