Funding for this research was provided by:
Department of Health Generalitat de Catalunya (SLT006/17/00127)
Instituto de Salud Carlos III (CM17/00180, PI14/01109)
Received: 26 July 2018
Accepted: 11 February 2019
First Online: 21 February 2019
Ethics approval and consent to participate
: The protocol of this study was approved by the ethics committee of the Hospital Universitari de Bellvitge.
: Not applicable.
: The authors declare that they have no competing interests.
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