1 London BTX Centre, London,UK
2 British Neurotoxin Network, Guildford, UK
3 Department of Neurology, Nottingham University Hospitals, Nottingham, UK
4 Department of Neurology, United Lincolnshire Hospitals, Lincoln, UK
5 Department of Neurology, Sheffield Teaching Hospitals NHSFT, Sheffield, UK
6 Department of Neurology, Kettering General Hospital NHS Foundation Trust, Kettering, UK
Correspondence to
Dr Marie-Helene Marion, London BTX Centre, 9a Wilbraham Place Practice, London SW1X 9AE, UK; mariehelenemarion@gmail.com