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Article History

Received: 1 February 2019

Accepted: 9 April 2019

First Online: 3 May 2019

Ethics approval and consent to participate

: This study was performed under the principles of the Declaration of Helsinki and approved by the Parc de Salut Mar Ethics Committee in Barcelona (Research Protocol 2017/7451/I), in compliance with the Spanish Law on Personal Data Protection (LOPD-15/1999) for observational studies with deidentified data and waiver of consent.

: Not applicable.

: The authors declare that they have no competing interests.

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