Affiliation: | 1. Pferdeklinik am Kottenforst, , Wachtberg, Germany;2. Rood and Riddle Equine Hospital, , Lexington, Kentucky, USA;3. Department for Medical Biometry, Informatics and , Epidemiology, Medical School, University of Bonn, , Bonn, Germany;4. Equine Reproduction Unit, Clinic for Horses, , Freie Universit?t Berlin, Berlin, Germany |