- Correspondence to Professor JM Pumar, Department of Neuroradiology, Hospital Clinico Universitario, Universidad de Santiago de Compostela, Travesía de la Choupana s/n, Santiago de Compostela, Dp 157066, Spain;
- Received 28 February 2017
- Revised 20 April 2017
- Accepted 23 April 2017
- Published online 10 May 2017.
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