1 Department of Pediatrics and Adolescent Medicine, General University Hospital and First Faculty of Medicine, Charles University, Prague, Czech Republic.
2 Department of Pediatrics, Faculty of Medicine, Masaryk University and University Hospital Brno, Brno, Czech Republic.
3 Institute of Pathology, General University Hospital and First Faculty of Medicine, Charles University, Prague, Czech Republic.
4 Department of Pediatrics and Adolescent Medicine, General University Hospital and First Faculty of Medicine, Charles University, Prague, Czech Republic. martin.magner@vfn.cz.
5 Department of Pediatrics, Thomayer Hospital and First Faculty of Medicine, Charles University, Prague, Czech Republic. martin.magner@vfn.cz.