Affiliation: | (1) Department of Diagnostic Radiology, Brain Korea 21 project for Medical Science, Yonsei University College of Medicine, 132 Shinchondong, Seodaemoon-gu, 120-752 Seoul , Korea;(2) Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea;(3) Department of Pathology, Yonsei University College of Medicine, Seoul, Korea;(4) Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Korea |