- Correspondence to Dr Jens Altenbernd, Department of Radiology, Neuroradiology and Nuclear Medicine, Knappschaftskrankenhaus Recklinghausen – Klinikum Vest, Dorstener Straße 151, Recklinghausen 45657, Germany;
- Received June 1, 2017
- Revised July 20, 2017
- Accepted July 25, 2017
- First published August 18, 2017.
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