Funding for this research was provided by:
European Commission under the Seventh Framework Programme (grant agreement 242141)
Article History
Received: 16 July 2019
Accepted: 15 June 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: The study was approved by the Jagiellonian University Bioethics Committee (approval number KBET/104/B/2011). Written informed consent to participate was obtained from all study respondents.
: Not applicable.
: The authors declare that they have no competing interests.