1. L. C. Cork, Chair, Department of Comparative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA.
2. T. B. Clarkson, Chair, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC 06511, USA.
3. R. O. Jacoby, Chair, Section of Comparative Medicine, and Director, Animal Resources Center, Yale University, New Haven, CT 06511, USA.
4. D. J. Gaertner, Director, Institute for Animal Studies, Department of Microbiology and Immunology, Albert Einstein College of Medicine, Yeshiva University, New York, NY 10033, USA.
5. S. L. Leary, Assistant Vice Chancellor for Veterinary Affairs, Washington University School of Medicine, Saint Louis, MO 63130, USA.