1. Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria
2. Department of Neurology, Innsbruck Medical University, Innsbruck, Austria
3. Department of Pediatrics, Bruneck Hospital, Italy
4. Department of Ophthalmology, Innsbruck Medical University, Innsbruck, Austria
5. Department of Neuroradiology, Innsbruck Medical University, Innsbruck, Austria