1. The University of Western Ontario; London Ontario N6A 5B9 Canada
2. University of Ottawa; Ottawa Ontario K1N 9B4 Canada
3. Consulting Chemist; Delray Beach Florida 33483 United States
4. Institut für Biotechnologie, Forschungszentrum Jülich GmbH; Jülich Federal Republic of Germany
5. CORA Engineering; Chur Switzerland
6. Hoechst Aktiengesellschaft; Frankfurt Federal Republic of Germany