Swansea University - Swansea University Medical School, University of Göttingen - University Medical Centre, Imperial College London, University of Nottingham - Division of Clinical Neurosciences, University of Cambridge, University College London - UCL Queen Square Institute of Neurology, Newcastle Upon Tyne Hospitals NHS Foundation Trust, Lancaster University - Faculty of Health and Medicine, Leeds Teaching Hospitals NHS Trust, Brighton and Sussex University Hospitals NHS Trust, Clinical Neurosciences, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, UK, Government of the United Kingdom - Royal Devon and Exeter NHS Foundation Trust, Government of the United Kingdom, Department of Health, National Health Service (NHS), University Hospitals Plymouth, Government of the United Kingdom - Luton and Dunstable University Hospital, University of Southampton - School of Clinical and Experimental Sciences, Government of the United Kingdom - Southend University Hospital, Belfast City Hospital, Royal Cornwall Hospital, Swansea Bay University Health Board, Government of the United Kingdom - Manchester Centre for Clinical Neurosciences, Government of the United Kingdom - Barts Health NHS Trust, Government of the United Kingdom - Sheffield Teaching Hospitals, South Devon NHS Foundation Trust, University College London - UCL Queen Square Institute of Neurology, Swansea University - Swansea University Medical School, Swansea University - UK MS Register, Imperial College London - Faculty of Medicine and Independent

University of Tübingen - Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, University of Tübingen - Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Friedrich-Alexander-Universität Erlangen-Nürnberg, University of Tübingen - Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology, MC Healthcare Evaluation, Università Vita-Salute San Raffaele - Experimental Neurophysiology Unit, AstraZeneca Pharmaceuticals, Robert Bosch Hospital - Department of Clinical Gerontology and Geriatric Rehabilitation, Government of the United Kingdom - Sheffield Teaching Hospitals, Carlos III Institute of Health - CIBER de Epidemiología y Salud Pública (CIBERESP), Newcastle Upon Tyne Hospitals NHS Foundation Trust, Neurology Department, University Medical Center Schleswig-Holstein, Campus Kiel, University of Zurich - Epidemiology, Biostatistics and Prevention Institute (EBPI), University of Tübingen - Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology and Robert Bosch Hospital - Department of Clinical Gerontology and Geriatric Rehabilitation