1. Department of Veterinary Clinical Science; Royal Veterinary College; Hawkshead Lane North Mymms Hertfordshire AL9 7TA
2. Klinik für Kleintiere; Justus-Liebig-Universität Giessen; Frankfurterstrasse 126 D-35392 Giessen Germany
3. Kleintierprais HallMar; Oberdorfstrasse 4 CH-5706 Boniswil Switzerland