1. Grönemeyer Institute of MicroTherapy, Department of Radiology and Microtherapy, University of Witten/Herdecke, Bochum, Germany; EFMT Development and Research Center for Microtherapy, Bochum, Germany
2. Grönemeyer Institute of MicroTherapy, Department of Radiology and Microtherapy, University of Witten/Herdecke, Bochum, Germany