1. Department of Small Animals and Horses, Obstetrics, Gynaecology and Andrology Vetmeduni Vienna Vienna Austria
2. Graf Lehndorff Institute for Equine Science Vetmeduni Vienna Neustadt (Dosse) Germany
3. Institute for Animal Nutrition Free University Berlin Berlin Germany
4. Department of Small Animals and Horses, Artificial Insemination and Embryo Transfer Vetmeduni Vienna Vienna Austria