1. Department of Radiology and Research Institute of Radiological Science Severance HospitalYonsei University College of Medicine Seoul Republic of Korea
2. Department of Radiology and Research Institute of Radiology Asan Medical Center University of Ulsan College of Medicine Seoul Republic of Korea
3. School of Computer Science and Engineering Soongsil University Seoul Republic of Korea
4. Department of Surgery Asan Medical Center University of Ulsan College of Medicine Seoul Republic of Korea