1. Department of Health Policy and Management Bloomberg School of Public Health, Johns Hopkins University Baltimore Maryland USA
2. Department of Medical Ethics and Health Policy University of Pennsylvania Philadelphia Pennsylvania USA
3. Leonard Davis Institute of Health Economics University of Pennsylvania Philadelphia Pennsylvania USA
4. Department of Anesthesiology and Pain Medicine University of Washington, Harborview Medical Center Seattle Washington USA
5. Cambia Palliative Care Center of Excellence University of Washington, Harborview Medical Center Seattle Washington USA