1. Department of Pathology, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju, Korea.
2. Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
3. Department of Internal Medicine, Konkuk University Chungju Hospital, Konkuk University School of Medicine, Chungju, Korea.
4. Department of Pathology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.