1. Institute of Inherited Metabolic Disorders; First Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
2. Department of Ophthalmology; First Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
3. Department of Paediatrics and Adolescent Medicine; First Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
4. Cardiff Eye Unit; University Hospital of Wales; Cardiff UK
5. School of Optometry & Vision Sciences; Cardiff University; Cardiff UK