Affiliation: | 1. Department of Internal Medicine, College of Medicine, Brain Korea 21 for Medical Science, Severance Biomedical Science Institute, Yonsei University, 134 Shinchon-Dong Seodaemoon-Gu, Seoul, 120-752, Korea 2. Department of Internal Medicine, College of Medicine, International St. Mary’s Hospital, Catholic Kwandong University, Incheon, Korea
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