1. Department of Neurology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
2. Department of Pediatrics; University of Maryland; Baltimore MD USA
3. Department of Maxillofacial Surgery; University Medical Center Hamburg-Eppendorf; Hamburg Germany
4. Department of Medical Genetics; University of British Columbia, and Child & Family Research Institute; Vancouver Canada
5. Department of Internal Medicine; Hospital Itzehoe; Itzehoe Germany
6. Institute of Human Genetics; University of Ulm; Ulm Germany