- Correspondence to Dr Sebastian Fischer, Knappschaftskrankenhaus Bochum-Langendreer Universitätsklinik, Institut für Diagnostische und Interventionelle Radiologie, Neuroradiologie und Nuklearmedizin, In der Schornau 23–25, Bochum 44892, Germany;
- Received August 7, 2015
- Revised October 24, 2015
- Accepted October 30, 2015
- First published December 9, 2015.
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