[1] The University of Texas MD Anderson Cancer Center,Department of Palliative Care and Rehabilitation and Integrative Medicine , Unit 1414
[2] Pontificia Universidad Católica de Chile,Programa de Medicina Paliativa y Cuidados Continuos, Facultad de Medicina
[3] The University of Texas MD Anderson Cancer Center,Department of Biostatistics
[4] AIM Specialty Health,undefined
[5] Medical Oncology,undefined