1 Assistant professor, Department of Public Health, Amsterdam Public Health research institute, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; d.s.kringos@amc.uva.nl; ORCID: https://orcid.org/0000-0003-2711-4713. Vice chairman of the board, OptiMedis AG, Hamburg, Germany, and honorary senior lecturer in health services research, London School of Hygiene and Tropical Medicine, London, United Kingdom; ORCID: https://orcid.org/0000-0002-1099-2950. Professor in clinical health services research, Department of Clinical Medicine, Danish Center for Clinical Health Services Research, Aalborg University, Aalborg, Denmark; ORCID: https://orcid.org/0000-0003-0053-5649.