- Correspondence to Dr Hyun-Sook Chi, Department of Laboratory Medicine, Asan Medical Center, 86 Asanbyeongwon-gil, Songpa-gu, Seoul 138-736, Korea;
- Received August 19, 2012
- Revised November 11, 2012
- Accepted November 15, 2012
- First published April 21, 2013.
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