Funding for this research was provided by:
Received: 20 July 2020
Accepted: 25 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: Ethical approval for this study was granted by the University of Utrecht Ethics Committee (Reference number 18–494/C). All participants gave verbal informed consent at the beginning of each interview for participation to this study, which was approved by the ethics committee.
: Not applicable.
: Arie Franx was part of the ICHOM PCB outcome set Working Group. The other authors declare that they have no competing interests.