1. Palliative Care Unit, Hospital Universitario La Paz, Madrid, Spain,
2. Palliative Home Care Team, Madrid, Spain
3. Department of Health Disparities Research, Center for Research on Minority Health, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA
4. Técnico Unidad Docente, Madrid, Spain
5. Department of Palliative Care and Rehabilitation Medicine, The University of Texas M. D. Anderson Cancer Center Houston, Texas, USA