- Correspondence to Professor Gyungyub Gong, Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Korea;
- Received April 30, 2015
- Revised September 23, 2015
- Accepted September 28, 2015
- First published October 16, 2015.
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