1. Department of Radiation Oncology, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Republic of Korea
2. Department of Physical Medicine and Rehabilitation, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Republic of Korea
3. Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory, Emory University School of Medicine, Atlanta, GA 30322, USA
4. Department of Radiation Oncology, Busan Paik Hospital, Inje University School of Medicine, Busan 48108, Republic of Korea
5. Department of Radiation Oncology, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan 49267, Republic of Korea
6. Department of Radiation Oncology, Dong-A University College of Medicine, Busan 49315, Republic of Korea
7. Department of Radiation Oncology and Biomedical Research Institute, Pusan National University School of Medicine, Busan 49241, Republic of Korea
8. Department of Biological Sciences, Pusan National University, Busan 46241, Republic of Korea
9. Department of Radiation Oncology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea