1. Department of Interventional Radiology, East Kent Hospitals University NHS Foundation Trust, Canterbury, UK
2. Department of Interventional Radiology, Guy’s & St. Thomas Hospitals NHS Foundation Trust, London, UK
3. Azienda Ospedaliera S Croce E Carle, Cuneo, Piemonte, Italy
4. Department of Interventional Radiology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK