Mixture model for inferring susceptibility to mastitis in dairy cattle: a procedure for likelihood-based inference Daniel Gianola, Jørgen Ødegård, Bjørg Heringstad, Gunnar Klemetsdal, Daniel Sorensen, Per Madsen, Just Jensen and Johann Detilleux Genet. Sel. Evol., 36 1 (2004) 3-27 DOI: 10.1051/gse:2003048