Article History
Received: 23 May 2019
Accepted: 2 July 2020
First Online: 13 July 2020
Ethics approval and consent to participate
: Not applicable.
: Patients agreed for their personal details to be published in this article, provided that their names and date of birth do not appear; the consent was oral, given that patients were illiterate and given the non-invasive nature of the research.
: None.