1Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan, R.O.C.
2Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan, R.O.C.
5Cancer Research Center, National Taiwan University College of Medicine, Taipei, Taiwan, R.O.C.
6National Taiwan University Cancer Center, National Taiwan University College of Medicine, Taipei, Taiwan, R.O.C.