Text and Data Mining valid from 2020-01-07
Received: 19 March 2019
Accepted: 28 November 2019
First Online: 7 January 2020
Ethics approval and consent to participate
: Ethics approval and consent to participate was not applicable to this study, as it takes a theoretical approach, without human or animal subjects.
: Consent for publication is also not applicable, as the paper is theoretical.
: Competing interests are not present.