Text and Data Mining valid from 2020-05-04
Received: 1 September 2019
Accepted: 31 March 2020
First Online: 4 May 2020
Ethics approval and consent to participate
: “All procedures performed in studies involving human participants were under the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.” All participants were informed about the study and purpose of the study and they signed the consent to participate in the study.
: “Not applicable”.
: “The authors declare that they have no competing interests”.