1 Erasmus School of Health Policy and Management, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands. brouwer@eshpm.eur.nl.
2 Erasmus School of Health Policy and Management, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands.
3 Institute for Medical Technology Assessment (iMTA), Rotterdam, The Netherlands.