1. Topigs Norsvin Research Center, P.O. Box 43, 6640 AA Beuningen, the Netherlands.
2. Topigs Norsvin, Visconde do Rio Branco 1310, 80.420-210 Curitiba, Brazil.
3. Wageningen University & Research, P.O. Box 338, 6700 AH Wageningen, the Netherlands.
4. Norsvin, Storhamargata 44, 2317 Hamar, Norway.