1. Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea;
2. Department of Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea;
3. Department of Radiation Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea;
4. Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea;
5. Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea