1. Small Animal Clinic; University of Veterinary Medicine Hannover, Foundation; Bünteweg 9 Hannover 30559 Germany
2. Institute of Forming Technology and Machines; Leibniz University Hannover; Hannover Germany
3. Small Animal Clinic; Faculty of Veterinary Medicine; National University of Colombia; Bogotá Colombia
4. Faculty of Veterinary Medicine; Department of Surgery; Cairo University; Giza 12211 Egypt
5. Department of Orthopaedic Surgery; Hannover Medical School; Hannover Germany