1 Center for Healthcare Operations Improvement and Research, University of Twente, Drienerlolaan 5, Enschede, 7500 AE, the Netherlands. r.buter@utwente.nl.
2 Industrial Engineering and Business Information Systems, University of Twente, Drienerlolaan 5, Enschede, 7500 AE, the Netherlands. r.buter@utwente.nl.
3 Department of Anesthesiology, Amsterdam UMC Location University of Amsterdam, Meibergdreef 9, Amsterdam, 1105 AZ, the Netherlands.
4 Health Technology & Services Research, University of Twente, Drienerlolaan 5, Enschede, 7500 AE, the Netherlands.
5 Center for Healthcare Operations Improvement and Research, University of Twente, Drienerlolaan 5, Enschede, 7500 AE, the Netherlands.
6 Industrial Engineering and Business Information Systems, University of Twente, Drienerlolaan 5, Enschede, 7500 AE, the Netherlands.