Funding for this research was provided by:
Third Health Programme (710033)
Received: 11 June 2019
Accepted: 23 December 2019
First Online: 3 January 2020
Ethics approval and consent to participate
: The conduct of this study was granted permission by the Institutional Review Board of the Vrije Universiteit Brussel (reference: B.U.N. 143201734384). Participant consent was requested before the focus groups in the form of an informed consent. Signed written consent forms were completed by all participants.
: Not applicable.
: The authors declare that they have no competing interests.