1. Center for Health System Sustainability (CHeSS) Brown University School of Public Health Providence Rhode Island USA
2. Department of Health Policy London School of Economics London UK
3. European Observatory for Health Systems and Policies London United Kingdom
4. World Health Organization Barcelona Office for Health Systems Financing Barcelona Spain
5. Health Services Research and Policy Department London School of Hygiene and Tropical Medicine London UK
6. Organization for Economic Co‐operation and Development Paris France