1. Department of Radiation Oncology, Jeonbuk National University Medical School, Jeonju 54907, Republic of Korea
2. Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju 54907, Republic of Korea
3. Division of Oncology, Department of Internal Medicine and Oncology, Semmelweis University, H-1083 Budapest, Hungary
4. Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, H-1083 Budapest, Hungary