Andrew Hitchings, BSc(Hons) MBBS PhD MRCP FHEA FFICM, Senior Lecturer in Clinical Pharmacology, St George's, University of London; Honorary Consultant in Neurointensive Care, St George's University Hospitals NHS Foundation Trust, London, UK.Andrew Hitchings, BSc(Hons) MBBS PhD MRCP FHEA FFICM, Senior Lecturer in Clinical Pharmacology, St George's, University of London; Honorary Consultant in Neurointensive Care, St George's University Hospitals NHS Foundation Trust, London, UK.