INIA – Madrid, Spain

Swedish University of Agricultural sciences, uppsala, sweden

Newcastle university, newcastle upon tyne, united kingdom

Norwegian University of life sciences, Aas, Norway

national institute for agricultural research, toulouse & rennes, france

Iowa state university, ames, uSA

university of new england, armidale, australia

french pork and pig institute, Le Rheu, france

Agricultural Technological institute of Castile and Leon, hontalbilla, spain