1. Department of Radiation Oncology, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
2. Department of Urology, National Taiwan University College of Medicine and Hospital, Taipei, Taiwan
3. Division of Radiation Oncology, Department of Oncology, National Taiwan University College of Medicine and Hospital, Taipei, Taiwan
4. Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan
5. Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan