Text and Data Mining valid from 2019-12-01
Received: 23 July 2019
Accepted: 22 November 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: Because of the research design, the need for a formal vote was waived after consultation of the Ethics Committee. To ensure data protection all data were collected without any demographic information allowing identification of participants. All participants gave their consent to use of data for this study.
: All participants were informed about the study and gave their consent to publication of survey data.
: The authors declare that they have no competing interests.