Authors’ contributions
JV, WvH and VR designed the study. JV, VdJ, and VR conducted the interviews. JV and HW translated the audio-recordings. JV, HW and VdJ performed the content analysis. Tables were made by JV. The first draft of the manuscript was written by JV and VdJ. SL, AJ, VR and WvH commented on subsequent versions of the manuscript. All authors read and approved the final manuscript.