1. Institute of Inherited Metabolic Disorders, First Faculty of Medicine; Charles University and General University Hospital; Prague Czech Republic
2. Department of Metabolism and Clinical Genetics; Mother and Child Health Care Institute of Serbia; Belgrade Serbia
3. School of Medicine; University of Belgrade; Belgrade Serbia
4. Department of Pediatrics; University Hospital Center; Zagreb Croatia
5. 2nd Department of Pediatrics; Comenius University Medical School in Bratislava University Children's Hospital; Bratislava Slovakia
6. 1st Department of Pediatrics; Comenius University Medical School in Bratislava University Children's Hospital; Bratislava Slovakia
7. Department of Pediatrics; University Hospital Center and University of Zagreb, School of Medicine; Zagreb Croatia
8. Department of Laboratory Diagnostics; University Hospital Centre Zagreb and School of Medicine; Zagreb Croatia
9. Department of Paediatrics; Children's Hospital Zagreb, School of Medicine; Zagreb Croatia
10. Department of Paediatrics and Adolescent Medicine, First Faculty of Medicine; Charles University and General University Hospital; Prague Czech Republic