3 Charité, University Medicine Berlin, Berlin, Germany; Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK; Department of Health Policy, London School of Economics and Political Science, London WC2A 2AE, UK.
4 Department of Health Policy, London School of Economics and Political Science, London WC2A 2AE, UK.
5 Department of Health Policy, London School of Economics and Political Science, London WC2A 2AE, UK. Electronic address: e.a.mossialos@lse.ac.uk.