Funding for this research was provided by:
EuroQol Research Foundation
Received: 27 April 2020
Accepted: 26 November 2020
First Online: 12 December 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Ethics Committee of the medical association of Baden-Württemberg, reference number: F-2010-050) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: KB, CJ, JA, and TM are employees of Xcenda GmbH. Xcenda GmbH received research grants from the EuroQoL group to design and conduct the study, to perform the statistical analyses, and to write the manuscript.WG is member of the EuroQoL group and received research grants from the EuroQoL group to design and conduct the study, to perform the statistical analyses, and to write the manuscript.NW, MJ, EE, AS, and NM declare that they have no conflict of interest.