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Article History

Received: 22 October 2019

Accepted: 23 January 2020

First Online: 1 February 2020

Compliance with ethical standards

:

: Ana-Belen Fernandez-Cortiñas, Jesus Vidal Campos and Fernando Marco Martinez confirm that neither they nor any member of their immediate family have received any financial payments or other benefits from any commercial entity related to the subject of this article. No outside funding or grants were used to assist with this study.

: This study was conducted in accordance with Good Clinical Practice guidelines and the Declaration of Helsinki. Written consent was obtained from every patient.

: This study has been carried out in accordance with national and European legislation on clinical research, following international ethical recommendations, the Declaration of Helsinki and the Council of Europe with regard to the Convention on Human Rights and Biomedicine. The study has complied at all times with the requirements established in the Spanish legislation in the field of biomedical research, personal data protection and bioethics. This study was approved by the Ethical Committee of Reference (Autonomous committee of research ethics in Galicia. No 2016/125).