1. Department of Animal Husbandry, Thuringian State Institute for Agriculture, Jena, Germany
2. Animal Health Service, Thuringian Animal Diseases Fund, Jena, Germany
3. Thuringian Ministry of Labour, Social Affairs, Health, Women and Family, Erfurt, Germany
4. Clinic for Obstetrics, Gynecology and Andrology with Veterinary Ambulance, Justus-Liebig-University Giessen, Giessen, Germany