1. Methodologies Division, Faculty of Nursing. Midwifery & Palliative Care, King’s College London , London WC2R 2LS, United Kingdom
2. Jönköping Academy for Improvement of Health and Welfare, School of Health and Welfare Jönköping University , Box 1026, Jönköping 551 11, Sweden
3. Department of Medical education, Brighton and Sussex Medical School, Falmer campus , Village Way, Brighton BN1 9PH, United Kingdom
4. Department of Social Psychology, School of Health Sciences, University of Skövde, Högskolevägen 3 , Skövde 549 55, Sweden