1. Institute for Animal Nutrition; University of Veterinary Medicine Hannover, Foundation; Hannover Germany
2. Boehringer Ingelheim Veterinary Research Center GmbH & Co. KG; Hannover Germany
3. Veterinärgesellschaft im BHZP; Uelzen Germany
4. BHZP GmbH; Dahlenburg-Ellringen Germany
5. Boehringer Ingelheim Vetmedica GmbH; Ingelheim am Rhein Germany