- Correspondence to Dr Chan-Sik Park, Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea;
- Received 3 March 2016
- Revised 22 June 2016
- Accepted 2 July 2016
- Published online 21 July 2016.
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