1. Department of Palliative Medicine, Royal Marsden and Royal Brompton NHS Foundation Trusts, London, UK; Department of Palliative Care, Policy & Rehabilitation, Cicely Saunders Institute, King’s College London, London, UK
2. Department of Palliative Care, Policy & Rehabilitation, Cicely Saunders Institute, King’s College London, London, UK
3. Department of Palliative Medicine, Royal Marsden and Royal Brompton NHS Foundation Trusts, London, UK; National Heart and Lung Institute, Imperial College London, London, UK
4. National Heart and Lung Institute, Imperial College London, London, UK; Department of Respiratory Medicine, Royal Brompton NHS Foundation Trust, London, UK
5. Department of Respiratory Medicine, King’s College Hospital, London, UK