Affiliation: | 1. Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea 2. Department of Radiology, College of Medicine, The Catholic University of Korea, #222 Banpo-daero, Seocho-gu, Seoul, 137-701, Korea 3. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea 4. Department of Internal Medicine, Soonchunghyang University College of Medicine, Bucheon, Korea 5. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea 6. Department of Internal Medicine, Keimyung University College of Medicine, Daegu, Korea 7. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea 8. Department of Internal Medicine, College of Medicine, Yeungnam University, Daegu, Korea
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