1. Wageningen UR Livestock Research, P.O. Box 338, 6700 AH Wageningen, the Netherlands
2. Rovecom, Elbe 2, 7908 HB Hoogeveen, the Netherlands
3. Agrifirm, Landgoedlaan 20, 7325 AW Apeldoorn, the Netherlands
4. Utrecht University, Yalelaan 7, 3584 CL Utrecht, the Netherlands