Affiliation: | 1. Department of Radiology, Korea University Guro Hospital, Korea University College of Medicine, 97 Gurodong, Guro-gu, Seoul, 172-703, Korea 2. Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea 3. Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Gyeonggi-do, Korea 4. Department of Pediatrics, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
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