1 Specialty Registrar and Clinical Research Fellow in the University College London/Interventional Oncology Service, University College London Hospitals NHS Foundation Trust, London NW1 2BU.
2 Specialty Registrar in the University College London/ Interventional Oncology Service, University College London Hospitals NHS Foundation Trust, London.
3 Specialty Registrar and Academic Clinical Fellow in the University College London/Interventional Oncology Service, University College London Hospitals NHS Foundation Trust, London.
4 Clinical Fellow in the University College London/Interventional Oncology Service, University College London Hospitals NHS Foundation Trust, London.
5 Consultant Interventional Radiologist in the Department of Radiology, University College London Hospital, and Honorary Clinical Senior Lecturer in the Division of Surgery and Interventional Science, University College London, London.