- Correspondence to Dr Miguel Ángel Marín Gabriel, Hospital Universitario Puerta de Hierro-Majadahonda, C/Manuel de Falla s/n. CP 28222, Majadahonda, Madrid, Spain;
- Received August 29, 2012
- Revised March 20, 2013
- Accepted June 12, 2013
- First published July 9, 2013.
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