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Article History

Received: 26 March 2019

Accepted: 21 June 2019

First Online: 1 July 2019

Compliance with ethical standards

:

: The authors declare that they have no conflict of interest.

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article was approved by University Hospital Miguel Servet review board of Zaragoza.

: An informed consent was obtained from all individual participants included in the study.