1. Clinic for Cattle, University of Veterinary Medicine Hannover, Foundation, 30173 Hannover, Germany
2. Department of Biometry, Epidemiology and Information Processing (IBEI), WHO Collaborating Centre for Research and Training for Health at the Human-Animal-Environment Interface, University of Veterinary Medicine Hannover, Foundation, 30173 Hannover, Germany
3. Clinic for Ruminants with Ambulatory and Herd Health Services, Ludwig-Maximilians Universität Munich, 80539 Munich, Germany
4. Clinic for Ruminants and Swine, Faculty of Veterinary Medicine, Freie Universität Berlin, 14163 Berlin, Germany