1. Lovelace Inhalation Toxicology Research Institute, Albuquerque, NM 87185
2. Current address: Chevron Environmental Health Center, Richmond, CA 94804
3. Current address: Small Particle Technology, Albuquerque, NM 87111
4. Deceased
5. U.S. Consumer Product Safety Commission, Washington, DC 20201
6. Current address: U.S. Environmental Protection Agency, Washington, DC 20460