[1
]Department of Radiation Oncology; Severance Hospital; Yonsei University College of
Medicine; Seoul Korea
[2
]Department of Radiation Oncology; Asan Liver Center; Asan Medical Center; University
of Ulsan College of Medicine; Seoul Korea
[3
]Department of Radiation Oncology; Samsung Medical Center; Sungkyunkwan University
School of Medicine; Seoul Korea
[4
]Department of Medical Device Management and Research; SAIHST; Sungkyunkwan University;
Seoul Korea
[5
]Center for Liver Cancer; Research Institute and Hospital; National Cancer Center;
Goyang Korea
[6
]Department of Radiation Oncology; Gangnam Severance Hospital; Yonsei University College
of Medicine; Seoul Korea
[7
]Department of Radiation Oncology; Chonnam National University Medical School; Gwangju
Korea
[8
]Department of Radiation Oncology; Seoul National University College of Medicine; Seoul
Korea
[9
]Department of Radiation Oncology; Seoul St. Mary's Hospital; The Catholic University
of Korea; Seoul Korea
[10
]Department of Radiation Oncology; Dongsan Medical Center; Keimyung University School
of Medicine; Daegu Korea
[11
]Department of Radiation Oncology; Korea Institute Radiological & Medical Sciences;
Seoul Korea
[12
]Department of Radiation Oncology; Ansan Hospital; Korea University Medical Center;
Ansan Korea
[13
]Department of Biostatistics; Yonsei University College of Medicine; Seoul Korea