1 Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Institute Carlos III, Ministry of Health; Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Spain.
2 Department of Neurology, Clinical Dementia Center and National Reference Center for CJD Surveillance, University Medical School; German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany.
3 Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Institute Carlos III, Ministry of Health; Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Spain; Department of Neurology, Clinical Dementia Center and National Reference Center for CJD Surveillance, University Medical School, Göttingen, Germany.