1. Department of Radiology, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 110-744, Korea.
2. Meta-analysis for Imaging Studies on Diagnostic Test Accuracy and prognosiS (MIDAS) Group, Seoul, Korea.
3. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
4. Institute of Radiation Medicine and Kidney Research Institute, Seoul National University Medical Research Center, Seoul, Korea.
5. Department of Radiology, Seoul Metropolitan Government–Seoul National University Boramae Medical Center, Seoul, Korea.