Received: 3 September 2019
Accepted: 6 July 2020
First Online: 21 July 2020
Ethics approval and consent to participate
: This study was approved by the Bioethics Commission of the University of Almería. Reference: UALBIO2017/007 (Date: May 10, 2017). The participants signed an informed consent form in writing (which was provided to patients at the same time as they were given the questionnaire). This study was conducted in accordance with the Helsinki Declaration (1964).
: not applicable.
: The authors declare that they have no competing interests.