1 Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Lindwurmstrasse 4, 80337 Munich, Germany.
2 Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Lindwurmstrasse 4, 80337 Munich, Germany. Electronic address: ingo.borggraefe@med.uni-muenchen.de.