Text and Data Mining valid from 2018-11-16
Received: 7 August 2018
Accepted: 1 November 2018
First Online: 16 November 2018
Ethics approval and consent to participate
: This study was approved by the ethical committee of the Unió Catalana d’Hospitals, and informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.
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