Text and Data Mining valid from 2020-03-04
Received: 19 September 2019
Accepted: 27 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: The present study was approved by the <i>Comité Coordinador de Ética de la Investigación de Andalucía, Consejería de Salud, Junta de Andalucía (SPAIN)</i> with the protocol number 0532-N-17. Due to the retrospective nature of the study, no informed consent was required.
: Not applicable.
: The authors declare that they have no competing interests.