- Correspondence to Dr Mario Martínez-Galdámez, Hospital Universitario Fundación Jiménez Diaz, Avda de los Reyes Católicos, 2, Madrid 28040, Spain;
- Received 22 November 2016
- Accepted 3 February 2017
- Published in print 17 February 2017.
- Published online 20 February 2017.
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