- Correspondence to Professor Yoshiya Tanaka, The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi, Kitakyushu 807-8555, Japan;
- Received May 25, 2013
- Revised September 6, 2013
- Accepted November 5, 2013
- First published November 28, 2013.
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