1. The Hamner Institutes for Health Sciences; Institute for Chemical Safety Sciences; Research Triangle Park NC 27709 USA
2. Consultant in Toxicologic Pathology; Sackler School of Medicine, Tel Aviv University; Timrat 36576 Israel
3. The Dow Chemical Company; Midland MI 48640 USA
4. Research Toxicology Centre; S.P.A., Pomezia; Rome Italy