1 Cicely Saunders Institute of Palliative Care, Policy & Rehabilitation, King's College London, London SE5 9PJ, UK; Department of Nursing, University of Maiduguri, Maiduguri, Nigeria. Electronic address: oladayo.afolabi@kcl.ac.uk.
2 Cicely Saunders Institute of Palliative Care, Policy & Rehabilitation, King's College London, London SE5 9PJ, UK.