- Correspondence to Dr Tomas Dobrocky, University Institute of Diagnostic and Interventional Neuroradiology University of Bern, Inselspital Freiburgstrasse 10 3010 Bern Switzerland ;
- Received 5 June 2017
- Revised 17 July 2017
- Accepted 18 July 2017
- Published in print 5 August 2017.
- Published online 10 August 2017.
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