1 Department of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany. pintodossantos.daniel@gmail.com.
2 Department of Radiology, University Hospital Frankfurt, Frankfurt, Germany. pintodossantos.daniel@gmail.com.
3 Department of Medicine, Surgery and Dentistry, University of Salerno, Baronissi, Italy.
4 Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, The Netherlands.