1. Department of Neuroscience, Faculty of Medicine, Anglia Ruskin University, Chelmsford, Essex, , UK
2. Research and Development, Southend University Hospital NHS Foundation Trust, Essex, UK
3. Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, CA, USA
4. Vision and Eye Research Unit (VERU), Faculty of Medicine, Anglia Ruskin University, Cambridge, , UK
5. Symbolic Systems Program Department, Stanford University, Stanford, CA, USA
6. Radiology Department, Southend University Hospital NHS Foundation Trust, Essex, UK
7. Department of Neurology, Saarland University Medical Center, Homburg, Germany