1. Department of Radiation Oncology; Shuang Ho Hospital; Taipei Medical University; Taipei Taiwan
2. Department of Radiology; School of Medicine; College of Medicine; Taipei Medical University; Taipei Taiwan
3. Graduate Institute of Clinical Medicine; College of Medicine; Taipei Medical University; Taipei Taiwan
4. School of Public Health; National Defense Medical Center; Taipei Taiwan
5. Department of Neurological Surgery; Tri-Service General Hospital and National Defense Medical Center; Taipei Taiwan
6. Graduate Institute of Medical Sciences; National Defense Medical Center; Taipei Taiwan