- Correspondence to Dr Jens Altenbernd, Department of Radiology, Neuroradiology and Nuclear Medicine, Knappschaftskrankenhaus Recklinghausen – Klinikum Vest, Dorstener Straße 151, Recklinghausen 45657, Germany;
- Received 1 June 2017
- Revised 20 July 2017
- Accepted 25 July 2017
- Published in print 12 October 2017.
- Published first 18 August 2017.
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