1. Animal Science, Production and Welfare Division Faculty of Biosciences and Aquaculture Nord University Steinkjer Campus Norway
2. Department of Veterinary and Animal Sciences Faculty of Health and Medical Sciences University of Copenhagen, Denmark Frederiksberg Denmark
3. Graduate College Rush University Chicago IL USA
4. Department of Applied Mathematics and Computer Science Technical University of Denmark Kongens Lyngby Denmark
5. Department of Animal Science Aarhus University Tjele Denmark