- Dr S Hashimoto, First Department of Internal Medicine, Nihon University School of Medicine, 30–1 Oyaguchikamimachi, Itabashi-ku, Tokyo 173–8610, Japan email:
- Received June 30, 1999
- Revision requested October 14, 1999
- Revised May 4, 2000
- Accepted May 17, 2000
- First published September 1, 2000.
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