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Authors
Torres-Ayuso, P
Tello-Lafoz, M
Mérida, I
Ávila-Flores, A
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Article History
Received: 2 March 2015
Revised: 26 June 2015
Accepted: 7 July 2015
First Online: 24 August 2015
Competing interests
: The authors declare no conflict of interest.
