1. Clinic for Cattle, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm 15, D-30173 Hannover, Germany
2. Clinic for Ruminants and Herd Health Management, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Str. 104, D-35392 Giessen, Germany