Funding for this research was provided by:
Horizon 2020 Framework Programme (N 787580)
Received: 27 January 2021
Accepted: 21 May 2021
First Online: 28 May 2021
: The focus groups were performed after obtaining the ethics approval from the Ethics Committee of the KU Leuven (Protocol number G-2018 08 1306). All participants received an information letter about the purpose of our study. All participants signed the written informed consent form before starting the focus group.
: Not applicable.
: The authors declare that there is no conflict of interest.