1. From The Colyer Institute, P.O. Box 26118, San Diego, CA, 92196 (Fagan DA, Director); San Diego Wild Animal Park, 156500 San Pasqual Valley Road, Escondido, CA, 92027-7017 (Oosterhuis JE, Director of Veterinary Services); and P.O. Box 74325, Davis, CA, 95617 (Fagan JE)