1. Kennedy Institute of Ethics Georgetown University Washington DC USA
2. Department of Palliative Care, Rehabilitation, and Integrative Medicine The University of Texas MD Anderson Cancer Center Houston Texas USA
3. Department of Psychiatry and Behavioral Sciences Memorial Sloan Kettering Cancer Center New York New York USA
4. Weill Cornell Medical College New York New York USA
5. Ethics Committee, Memorial Sloan Kettering Cancer Center New York New York USA
6. Departments of Medicine and Philosophy and the Pellegrino Center for Clinical Bioethics Georgetown University Washington DC USA