- Correspondence to: Kuniaki Seyama MD, Department of Respiratory Medicine, Juntendo University, School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo 113-8421, Japan;
- Received February 19, 2007
- Accepted May 3, 2007
- Revised April 27, 2007
- First published May 11, 2007.
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