Funding for this research was provided by:
Horizon 2020 Framework Programme (64072)
Received: 10 September 2019
Accepted: 12 May 2020
First Online: 22 May 2020
Ethics approval and consent to participate
: This study is based on a survey answered by people anonymously, this declaration is not applicable.
: Not applicable.
: The authors declare that they have no competing interests.