- Dr R-S Lai, Division of Chest Medicine, Veterans General Hospital-Kaohsiung 386, Ta-Chung 1st Road, Kaohsiung, Taiwan.
- Received February 13, 1997
- Revision requested May 13, 1997
- Revised July 15, 1997
- Accepted December 3, 1997
- First published May 1, 1999.
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