1. Institute of Veterinary Medicine; Burckhardtweg 2; D-37077; Göttingen; Germany
2. Chronix Biomedical GmbH; Goetheallee 8; D-37073; Göttingen; Germany
3. Institute of Agricultural and Nutritional Sciences; Martin-Luther-University Halle-Wittenberg; Theodor-Lieser-Str. 11; D-06120; Halle/Saale; Germany