- Correspondence to: A Koizumi Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Konoe-cho, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan;
- Received April 18, 2006
- Accepted June 9, 2006
- Revised June 5, 2006
- First published June 20, 2006.
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