1. Institute of Nutritional Physiology (“Oskar-Kellner”), Research Institute for Farm Animal Biology (FBN), Dummerstorf, Germany
2. Institute of Animal Nutrition, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Brunswick, Germany
3. Institute for Animal Genetics, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Neustadt, Germany
4. Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany