Text and Data Mining valid from 2019-05-24
Received: 14 November 2018
Accepted: 20 May 2019
First Online: 24 May 2019
Ethics approval and consent to participate
: The Ethical Committee of Clinical Research from the University Hospital Vall d’Hebrón Barcelona, Spain approved this study [expedient number PR(AG)331-2017]. Informed consent was waived by the Committee as this is a retrospective study in which data were de-identified.
: Not applicable.
: The authors declare that they have no competing interests.