- Correspondence to: Dr S Qasim Mehdi Biomedical and Genetic Engineering Division, Dr A Q Khan Research Laboratories, GPO Box 2891, 24 Mauve area, Islamabad, Pakistan;
- Received June 21, 2004
- Accepted August 24, 2004
- Revised August 3, 2004
- First published April 29, 2005.
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