1. Department of Palliative Care and Rehabilitation Medicine, University of Texas MD Anderson Cancer Center, Houston
2. Department of Palliative Care and Rehabilitation Medicine, University of Texas MD Anderson Cancer Center, Houston2Clinique La Chavannerie, Groupe Orpea, Chaponost, France3Laboratoire EA 4129, Santé-Individu-Société, Université Lyon 1, Lyon, France
3. Programa Medicina Paliativa, Departamento Medicina Interna, Facultad de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile
4. Palliative Care Unit-IRCCS Arcispedale Santa Maria Nuova, Reggio Emilia, Italy
5. Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston
6. Department of Behavioral Science, University of Texas MD Anderson Cancer Center, Houston
7. Research Medical Library, University of Texas MD Anderson Cancer Center, Houston