1. IQ Healthcare Scientific Institute for Quality of Healthcare, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
2. Ministry of Health, Welfare and Sport, The Hague, the Netherlands
3. Department of Health Care Management, Berlin University of Technology, Berlin, Germany
4. City University of New York at Hunter College, New York, New York, USA
5. Harvard Medical School, Cambridge, Massachusetts, USA
6. Department of Health Policy, London School of Economics and Political Sciences, London, UK