- Correspondence to Dr Utano Tomaru, Department of Pathology, Hokkaido University Graduate School of Medicine, Kita-15, Nishi-7, Kita-ku, Sapporo 060-8638, Japan;
- Received August 26, 2013
- Revised October 22, 2013
- Accepted October 24, 2013
- First published November 29, 2013.
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