National Hospital of Neurology and Neurosurgery, London, Greater London, United Kingdom
Groote Schuur Hospital, Cape Town, South Africa
King Hussein Cancer Center, Amman, Jordan
University of Malaya Medical Center, Kuala Lumpur, Malaysia
Royal Berkshire Hospital, Reading, England, United Kingdom
Southend University Hospital, Southend, Essex, United Kingdom
Queen Alexandra Hospital, Portsmouth, Hampshire, United Kingdom
University Colllege London (ISEH), London, United Kingdom
Churchill Hospital, Oxford, United Kingdom
Derriford Hospital, Plymouth, United Kingdom
Southampton General Hospital, Southampton, United Kingdom
Royal Free Hospital, London, United Kingdom
University College London Hospital, London, United Kingdom
University College London Hospitals NHS Foundation Trust, London, United Kingdom