1. Institute of Animal Nutrition; Vetsuisse-Faculty; University of Zurich; Zurich Switzerland
2. Centre for Clinical Studies; Vetsuisse-Faculty; University of Zurich; Zurich Switzerland
3. Department of Physiology; University of Veterinary Medicine; Foundation Hannover Germany
4. Department of Farm Animals; Section of Swine Medicine; Vetsuisse-Faculty; University of Zurich; Zurich Switzerland
5. UFA AG; Herzogenbuchsee Switzerland
6. Centre for Applied Biotechnology and Molecular Medicine; University of Zurich; Zurich Switzerland