1. Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul - Korea
2. Department of Medical Device Management and Research, SAIHST, Sungkyunkwan University, Seoul - Korea
3. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul - Korea
4. Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul - Korea