1. The California Veterinary Diagnostic Laboratory System, P.O. Box 1770, Davis, California 95617, USA
2. Mystic Marinelife Aquarium, Division of Sea Reserach Foundation, Inc., Mystic, Connecticut 06355, USA
3. New England Regional Primate Research Center, Harvard Medical School, One Pine Hill Drive, Southborough, Massachusetts 01772, USA
4. Pfizer Central Research, Eastern Point Rd., Groton, Connecticut 06340, USA