- Correspondence to Dr Dae Chul Suh, Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Korea;
- Received April 24, 2017
- Revised May 24, 2017
- Accepted May 27, 2017
- First published June 21, 2017.
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