1. Small Animal Clinic, Institute of Veterinary Medicine, Georg-August University of Göttingen, Göttingen 37077, Germany.
2. Small Animal Clinic Hofheim, Hofheim am Taunus 65719, Germany.
3. Clinic of Obstetrics, Gynaecology and Andrology of Large and Small Animals of the Justus-Liebig-University Giessen, Giessen 35392, Germany.
4. Miprolab GmbH, Göttingen 37079, Germany.
5. Clinic of Small Animal Medicine, Ludwig Maximilian University of Munich, Munich 80539, Germany.