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Author Affiliations: 

Internal Medicine Training Year One, Psychiatry Specialty Training Year One, Neurology Registrar,Consultant Neurologist, Department of Clinical Neurosciences, NHS Lothian, Western General Hospital, Edinburgh, UK

*KB and LDB contributed equally to this paper

Correspondence to: 

Karina Bennett, Department of Clinical Neurosciences, NHS Lothian, Western General Hospital, Crewe Road South, Edinburgh EH4 2XU, UK  Email:

Journal Issue: 
Volume 49: Issue 3: 2019
Cite paper as: 
J R Coll Physicians Edinb 2019; 49: 193–8