1. Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, Kerpener Strasse 62, 50937 Cologne, Germany
2. Department of Pediatric Neurology, Justus-Liebig-University Giessen, Feulgen Str. 10-12, 35392 Giessen, Germany
3. Department of Nutritional Epidemiology, Institute of Nutritional and Food Science, University of Bonn, 53115 Bonn, Germany
4. Department of Neurology, Faculty of Medicine and University Hospital Cologne, Kerpener Strasse 62, 50937 Cologne, Germany
5. Novotec Medical GmbH, 75172 Pforzheim, Germany
6. Center of Prevention and Rehabilitation, UniReha, Faculty of Medicine and University Hospital Cologne, Lindenburger Allee 44, 50931 Cologne, Germany