Institution: | 1. Pharmatox Laboratories, Inc. , PO Box 1006, University Station, Ames , Iowa;2. Department of Physiology and Pharmacology , College of Veterinary Medicine and the Ames Laboratory of the US Atomic Energy Commission, Iowa State University , Ames , Iowa;3. Pharmatox Laboratories, Inc. , PO Box 1006, University Station, Ames , Iowa |