Text and Data Mining valid from 2019-11-08
Received: 5 June 2019
Accepted: 23 October 2019
First Online: 8 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Participation was voluntary and anonymous and completing the survey was accepted as consent by the participants.