1. ; Department of Pediatrics; University of Münster; Germany
2. ; Department of Pediatrics; University of Hamburg; Germany
3. ; Department of Pediatrics; University of Copenhagen; Denmark
4. ; Department of Clinical Chemistry; Free University of Amsterdam; The Netherlands
5. ; Institute of Physiology; University of Münster; Germany
6. ; Department of Anatomy; University of Münster; Germany
7. ; Department of Neurology; University of Berlin (Charité); Germany