Nigel Sykes Medical Director and Consultant in Palliative Medicine, St Christopher's Hospice, London, UK

Michael I Bennett Professor of Palliative Medicine, International Observatory on End of Life Care, Institute for Health Research, Lancaster University, Lancaster, UK

Chun-Su Yuan Cyrus Tang Professor of Anesthesia and Critical Care, Department of Anesthesia and Critical Care, Pritzker School of Medicine, The University of Chicago, Chicago, IL, USA