1. 1Chicago Zoological Society, Brookfield Zoo, Brookfield, IL
2. 2Illinois Zoological and Aquatic Animal Residency Program, Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL
3. 3Missouri Orthopaedic Institute, University of Missouri, Columbia, MO
4. 4Omaha's Henry Doorly Zoo and Aquarium, Omaha, NE
5. 5Kansas City Zoo, Kansas City, MO