1. CSB Box 423Baylor UniversityWacoTX76798U.S.A.
2. Datachem Inc.520 Wakara WaySalt Lake CityUT84108U.S.A.
3. Stanford Research Institute333 Ravenswood Ave.Menlo ParkCA94025U.S.A.
4. Department of ChemistryUniversity of SwazilandKwaluseniSwaziland
5. Institute of Pathobiology, P.O. Box 1176, Addis Ababa UniversityAddis AbabaEthiopia