1. Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea;
2. Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea;
3. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea;
4. Department of Pathology, College of Medicine, Seoul National University, Seoul, Korea;
5. Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Korea;
6. Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seongnam, Korea;
7. Department of Nuclear Medicine, Seoul National University, College of Medicine, Seoul, Korea