1 Department of Psychology, Faculty of Health and Life Sciences, University of Exeter, Exeter.
2 APEx (Exeter Collaboration for Academic Primary Care), Department of Health and Community Sciences, Faculty of Health and Life Sciences, University of Exeter, Exeter.
3 Division of Population Medicine, School of Medicine, Cardiff University; GP Rumney Primary Care Centre, Cardiff.
4 The Lowdown; GP Partner Woodhouse Health Centre, Sheffield.
5 Research Department of Practice and Policy, School of Pharmacy, University College London, London.