Received: 4 February 2019
Accepted: 21 November 2019
First Online: 26 December 2019
Ethics approval and consent to participate
: According to the Spanish Law (Ley de Investigación Biomédica 14/2007 de 3 de julio, ORDEN SAS/3470/2009, de 16 de diciembre -BOE núm. 310, de 25 diciembre [RCL 2009, 2577]-), this study was not subject to approval by an Institutional Review Board because it was an observational study which did not require any changes to standard clinical practice, and data which were analyzed for the study did not contain any personal data which would allow the identity of patients to be revealed.All procedures followed were in accordance with the ethical standards of the Helsinki Declaration of 1975, as revised in 1983.Participants were asked for a written informed consent, which authorized the use of demographic and clinical data deriving from their care for the purpose of this study.
: Participants were asked for a written informed consent, which authorized the use of demographic and clinical data deriving from their care for the purpose of this study. Following standard practice in Spain, neither patients nor clinicians received any compensation for their participation in this study.
: The authors declare that they have no competing interests.