1. Danish Reference Center for Prion Diseases, Department of Pathology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
2. Department of Neurology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
3. Danish Dementia Research Centre, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
4. Department of Clinical Genetics, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
5. National Creutzfeldt-Jakob Disease Research and Surveillance Unit, the University of Edinburgh, Edinburgh, United Kingdom