1. University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, 1000 Ljubljana, Slovenia.
2. BOKU, Gregor Mendel Str. 33, 1180 Vienna, Austria.
3. AREC Raumberg-Gumpenstein, 4601 Thalheim b. Wels, Austria.
4. LMU Munich, Veterinary Faculty, Lena-Christ-Straβe 48, 8215 Martinsried/Planegg, Germany.