1 Cicely Saunders Institute, Department of Palliative Care, Policy and Rehabilitation, King's College London, Denmark Hill, London SE5 9RS, UK. Electronic address: irene.higginson@kcl.ac.uk.
2 Cicely Saunders Institute, Department of Palliative Care, Policy and Rehabilitation, King's College London, Denmark Hill, London SE5 9RS, UK.
3 Department of Respiratory Medicine, King's College London, Denmark Hill, London SE5 9RS, UK.
4 Cicely Saunders Institute, Department of Palliative Care, Policy and Rehabilitation, King's College London, Denmark Hill, London SE5 9RS, UK; Department of Palliative Medicine, Munich University Hospital, Munich, Germany.