1. The University of Edinburgh Centre for Cognitive and Neural Systems, Centre for Dementia Prevention and the Euan MacDonald Centre for Motor Neurone Disease Research, Edinburgh, UK
2. Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
3. Department of Neurology, Institut d’Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, CIBERNED, Spain
4. Laboratory for Neurodegenerative Research, Center for Neurologic Diseases, Brigham and Women’s Hospital and Harvard Medical School, Harvard Institutes of Medicine, Boston, MA, USA