1. Centre for Health Services Studies, University of Kent , Canterbury CT2 7NF , UK
2. Faculty of Medical Sciences, University College London , London WC1E 6BT , UK
3. Nuffield Trust , 59 New Cavendish Street, London W1G 7LP , UK
4. Health Foundation , 8 Salisbury Square, London EC4Y 8AP , UK
5. Serjeants Inn Chambers , 85 Fleet Street London EC4Y 1 AE , UK