1. a University of Michigan, School of Public Health, Ann Arbor, MI 48109-2029
2. b BASF Corp., 1609 Biddle Ave., Wyandotte, MI 48192-3799
3. c Bayer Corp., 100 Bayer Road, Pittsburgh, PA 15205-9741
4. d Dow Chemical Company, 1803 Building, Midland, MI 48674
5. e ICI Co., 286 Mantua Grove, W. Deptford, NJ 08066-1732