1. Centre for Research in Primary and Community Care, University of Hertfordshire, Hatfield, UK
2. Centre for Health Service Studies, University of Kent, Canterbury, UK
3. Social Care Workforce Research Unit, King’s College London, London, UK
4. Research Department of Primary Care and Population Health, University College London Medical School (Royal Free Campus), London, UK
5. Tower Hamlets Clinical Commissioning Group, The Tredegar Practice, London, UK
6. The Preference Laboratory, The Dartmouth Institute for Health Policy & Clinical Practice, Lebanon, NH, USA