1. Department of Neurology, Vic University Hospital, Vic, Barcelona,
2. Department of Epidemiology, Vic University Hospital, Vic, Barcelona,
3. Department of Pharmacy, Vic University Hospital, Vic, Barcelona,
4. Department of Geriatry, Hospital de la Santa Creu, Vic, Barcelona,
5. Department of Neurology, Neuromuscular Diseases Unit, Hospital de Bellvitge, Hospitalet de Llobregat, Barcelona,
6. Department of Neurology, Neuromuscular Diseases Unit, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain, and
7. Maurice Wohl Clinical Neuroscience Institute, King's College London, Department of Clinical Neuroscience, London, UK