Funding for this research was provided by:
Interreg (032-3-06-013 APPS)
Received: 13 August 2020
Accepted: 25 December 2020
First Online: 13 January 2021
Ethics approval and consent to participate
: The study was granted ethics approval by the Ethics Review Panel of the University of Luxembourg (ERP 19-040 APPS-PHR INTERREG). Written informed consent was obtained by all survey participants.
: Not applicable.
: The authors declare that they have no competing interests.