1. Department of Paediatric Otorhinolaryngology, University Hospital Brno and Faculty of Medicine, Masaryk University Brno, Brno, Czech Republic
2. Department of Paediatric Anaesthesiology and Intensive Care Medicine, University Hospital Brno and Masaryk University Brno, Brno, Czech Republic
3. Department of Pediatrics, University Hospital Brno and Faculty of Medicine, Masaryk University Brno, Brno, Czech Republic