University of Glasgow - Institute of Neuroscience and Psychology, Government of the United Kingdom - Oxford University Hospitals NHS Foundation Trust, University of Glasgow, University of Edinburgh - Centre for Clinical Brain Sciences, University of Glasgow - Robertson Institute of Biostatistics and Clinical Trials Unit, University of Glasgow, University of Edinburgh - Centre for Clinical Brain Sciences, University of Nottingham, University of Newcastle, University of Aberdeen - Medical Sciences and Nutrition, Royal Victoria Infirmary, Imperial College London - Charing Cross Hospital, NHS Foundation Trust - St. Georges University Hospitals, NHS Foundation Trust - Addenbrooke's Hospital, Government of the United Kingdom - University Hospitals of North Midlands, Aberdeen Royal Infirmary, King’s College Hospital NHS Foundation Trust, Countess of Chester NHS Foundation Trust, University of Edinburgh, University of Oxford, University College London, Government of the United Kingdom - Luton and Dunstable University Hospital, Norfolk and Norwich University Hospital, Leeds General Infirmary - Department of Neurology, University of Southampton - Southampton General Hospital, Nottingham University Hospitals NHS Trust, The Queen Elizabeth Hospital, Watford General Hospital, Royal Victoria Hospital, Taunton & Somerset NHS Foundation Trust, Manchester Centre for Clinical Neurosciences and Independent

affiliation not provided to SSRN, affiliation not provided to SSRN, Government of the United Kingdom - NHS Greater Glasgow and Clyde, University of Edinburgh, University of Glasgow, Government of the United Kingdom - NHS Greater Glasgow and Clyde, Queen Elizabeth University Hospital, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Glasgow - Institute of Health and Wellbeing, Government of the United Kingdom - NHS Greater Glasgow and Clyde and affiliation not provided to SSRN