1. R. H Baker:
Pakistan Medical Research Centre, University Maryland School of Medical, Lahore, Pakistan
2. W. K Reisen:
Pakistan Medical Research Centre, University Maryland School of Medical, Lahore, Pakistan
3. R. K Sakai:
Pakistan Medical Research Centre, University Maryland School of Medical, Lahore, Pakistan
4. U. T Saifuddin:
Pakistan Medical Research Centre, University Maryland School of Medical, Lahore, Pakistan