[1
]
UCB Pharma Ltd, 208 Bath Road, Slough SL1 3WE, UK.
[2
]
School of Social and Community Medicine, University of Bristol, 39 Whatley Road, Bristol
BS8 2PS, UK.
[3
]
Northumbria Healthcare NHS Foundation Trust, North Tyneside General Hospital, Rake
Lane, North Shields, Tyne and Wear NE29 8NH, UK; Institute of Health and Society,
Newcastle University, Framlington Place, Newcastle upon Tyne NE1 7RU, UK.
[4
]
School of Clinical and Experimental Medicine, College of Medicine and Dental Sciences,
University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; Department of Neurology,
Sandwell and West Birmingham Hospitals NHS Trust, City Hospital, Birmingham B18 7QH,
UK. Electronic address: carlclarke@nhs.net.