1. Department of Internal Medicine, Bucheon St. Mary's Hospital, The Catholic University of Korea School of Medicine, Bucheon, Korea.
2. Department of Radiology, Bucheon St. Mary's Hospital, The Catholic University of Korea School of Medicine, Bucheon, Korea.
3. Department of Pathology, Bucheon St. Mary's Hospital, The Catholic University of Korea School of Medicine, Bucheon, Korea.
4. Department of Internal Medicine, Catholic Medical Center, The Catholic University of Korea School of Medicine, Seoul, Korea.