Funding for this research was provided by:
Received: 22 April 2020
Accepted: 31 July 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: The need for approval was waived by the Medical Ethics Committee Erasmus MC (MEC-2019-0189).
: Written consent for publication was given (via e-mail) by each interview participant (when applicable) for citing them within the context of this manuscript.
: The fourth author, DD, is professor at the Erasmus University Rotterdam while also employed at Zorginstituut Nederland (National Health Care Institute), which partially funds this research.