1. Department of Oncology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
2. Department of Radiation Oncology, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu, Taiwan
3. Department of Medical Imaging, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
4. Department of Medical Imaging, National Taiwan University Hospital Yun-Lin Branch, Yun-Lin, Taiwan
5. Graduate Institute of Oncology, National Taiwan University, Taipei, Taiwan
6. Department of Otolaryngology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan