1. Department of Radiology, National Taiwan University College of Medicine, Taipei, Taiwan
2. Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
3. Department of Oncology, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu, Taiwan
4. Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan
5. Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan