Daniel Horner, consultant in emergency medicine, consultant in intensive care medicine12, Catherine McMahon, consultant neurosurgeon2, Kerstin de Wit, professor of emergency medicine3, Angelos Kolias, consultant neurosurgeon4 1Division of infection, immunity and respiratory medicine, University of Manchester, UK 2Departments of neurosurgery and critical care medicine, Northern Care Alliance NHS Foundation Trust, UK 3Department of emergency medicine, Queen’s University, Kingston, Ontario,...