1. Department of Pediatrics and Neonatology, Kliniken Ostallgäu-Kaufbeuren, Kaufbeuren, Germany
2. Division of Pediatric Neurology, Department of Pediatrics, Medical University of Innsbruck, Innsbruck, Austria
3. Department of Ophthalmology and Optometry, Medical University of Innsbruck, Innsbruck, Austria
4. Department of Orthopedics, Medical University of Innsbruck, Innsbruck, Austria
5. Department of Pediatric Neurology, Children's Hospital Datteln, Witten/Herdecke University, Datteln, Germany