1. Department of Pediatrics and Prenatal Cardiology, University Hospital Ostrava, Ostrava, Czech Republic;
2. Biomedical Research Centre, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic;
3. Department of Pediatrics, Palacky University Hospital, Palacky University, Olomouc, Czech Republic;
4. Department of Medical Genetics, Palacky University Hospital, Palacky University, Olomouc, Czech Republic;
5. Department of Obstetrics and Gynecology, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic