Tobias SchwarzDepartment of Veterinary Clinical Studies, Glasgow University Veterinary School, Glasgow G61 1QH, Scotland. Present address is the Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104.
Christoph K. StörkDepartment of Veterinary Clinical Studies, Glasgow University Veterinary School, Glasgow G61 1QH, Scotland. Present address is Service de Chirurgie des Petits Animaux, Université de Liège, Boulevard de Colonster 20–B44, B-4000 Liège, Belgium.