[1
]
Department of Palliative Care and Rehabilitation Medicine, The University of Texas
M. D. Anderson Cancer Center, Houston, Texas, USA. Electronic address: marvin.delgado@mdanderson.org.
[2
]
Department of Palliative Care and Rehabilitation Medicine, The University of Texas
M. D. Anderson Cancer Center, Houston, Texas, USA; Department of Internal Medicine,
Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
[3
]
Department of Internal Medicine, College of Medicine, Kosin University, Busan, Republic
of Korea.
[4
]
Department of Biostatistics, The University of Texas M. D. Anderson Cancer Center,
Houston, Texas, USA.
[5
]
Department of Palliative Care and Rehabilitation Medicine, The University of Texas
M. D. Anderson Cancer Center, Houston, Texas, USA.