1. Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom
2. Warwick Medical School, The University of Warwick, Coventry, United Kingdom
3. Florence Nightingale Faculty of Nursing, Midwifery and Palliative Care, King’s College London, London, United Kingdom
4. Centre for Health Policy, School of Public Health, University of the Witwatersrand, Johannesburg, South Africa