1. Department of Radiation Oncology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
2. Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
3. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
4. Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
5. College of Medicine, China Medical University, Taichung, Taiwan
6. Graduate Institute of Clinical Medical Science, College of Medicine, China Medical University, Taichung, Taiwan
7. Department of Radiation Oncology, China Medical University Hospital, Taichung, Taiwan