1. Department of General Practice & Elderly Care Medicine, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
2. Department of Sociology and Interuniversity Centre for Social Science Theory and Methodology (ICS), University of Groningen, Groningen, the Netherlands
3. Accare, University Centre for Child and Adolescent Psychiatry, Groningen, the Netherlands
4. WHO Athens Office for Quality of Care and Patient Safety, Athens, Greece
5. Universitat Witten/Herdecke, Witten, Germany
6. Public Health Scotland, Edinburgh, Scotland
7. WHO Country Office, Bucharest, Romania
8. WHO, Department for Health System Governance and Financing, Geneva, Switzerland
9. Department of Women's and Children's Health, King's College London, London, England