1. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, National Veterinary Services Laboratories, Ames, IA (Emery, Ostlund, McFarling, McGonigle)
2. Excet Inc., Springfield, VA (Ait Ichou, Ballin)
3. U.S. Army Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD (Ait Ichou, Ballin)