1. Institute for Milk Hygiene, Milk Technology and Food Science
2. Institute for Medical Physics and Biostatistics, Veterinary University, Veterinärplatz 1, 1210 Vienna, Austria
3. Danish Institute for Food and Veterinary Research, Bülowsvej 27, DK-1790 Copenhagen, Denmark
4. Congen Biotechnologie, Robert-Roessler Strasse 10, 13125 Berlin, Germany