1. Department of Neurology, Queen’s Hospital, Romford RM7 0AG, UK
2. Department of Neuroradiology, Queen’s Hospital, Romford RM7 0AG, UK
3. Department of Anaesthetics, Queen’s Hospital, Romford RM7 0AG, UK
4. Department of Obstetrics & Gynaecology, Queen’s Hospital, Romford RM7 0AG, UK