Received: 4 March 2020
Accepted: 14 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Under Dutch law, this study did not need formal approval from an Ethical Review Board. Written informed consent was obtained from patients, before participating in the MaxDiff study.
: Patients have given their consent online in the maximum difference exercise, to use their data, the results of the ranking exercise, resulting in this article.
: The authors declare that they have no competing interests.