[1
]
Department of Radiology and Research Institute of Radiology, University of Ulsan College
of Medicine, Asan Medical Center, 86 Asanbyeongwon-Gil, Song pa-gu, Seoul 138-736,
Republic of Korea.
[2
]
Department of Radiology and Research Institute of Radiology, University of Ulsan College
of Medicine, Asan Medical Center, 86 Asanbyeongwon-Gil, Song pa-gu, Seoul 138-736,
Republic of Korea. Electronic address: jhkimrad@amc.seoul.kr.
[3
]
Department of Radiation Oncology, University of Ulsan College of Medicine, Asan Medical
Center, 86 Asanbyeongwon-Gil, Song pa-gu, Seoul 138-736, Republic of Korea.