Nan Greenwood1, Christopher McKevitt2, Alisoun Milne3. 1. 1 Faculty of Health, Social Care and Education, Kingston University and St George's University of London, London SW17 0RE, UK. 2. 2 Primary Care & Public Health Sciences, Kings College London, London WC2R 2LS, UK. 3. 3 School of Social Policy, Sociology and Social Research, University of Kent, Gillingham ME4 4AG, UK.