1. Department of Animal Health; Denver Zoo, 2300 Steele Street Denver CO 80205-5735 USA
2. Veterinary Specialty Hospital; 10435 Sorrento Valley Road San Diego CA 92121 USA
3. The Animal Medical Center; 510 East 62nd Street New York NY 10065 USA
4. San Diego Wild Animal Park, 15500 San Pasqual Valley Road Escondido CA 92027-7017 USA