- Correspondence to Professor Yoshiya Tanaka, The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu, Fukuoka 807-8555, Japan;
- Received April 10, 2013
- Revised July 6, 2013
- Accepted August 20, 2013
- First published September 6, 2013.
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