1. Departments of Pediatrics (O.S., D.Z., M.S., S.K., J.L., Z.S.), Czech Republic
2. Department of Pediatrics (J.Z.), Faculty of Medicine, Palacky University and University Hospital Olomouc, 77520 Olomouc, Czech Republic
3. Department of Pediatrics (D.N.), Faculty of Medicine, Masaryk University and University Hospital Brno, 61300 Brno, Czech Republic
4. Institute of Biology and Department of Medical Genetics (K.H.), First Faculty of Medicine, Charles University in Prague and General University Hospital, 12800 Prague 2, Czech Republic
5. Department of Pediatrics (I.P.), Faculty of Medicine, Charles University in Prague and University Hospital Hradec Kralove, 50005 Hradec Kralove, Czech Republic
6. Radiology (M.R.), Second Faculty of Medicine, Charles University in Prague and University Hospital Motol, 15006 Prague 5, Czech Republic
7. Department of Probability and Mathematical Statistics (Z.H.), Faculty of Mathematics and Physics, Charles University in Prague, 12116 Prague 2, Czech Republic