Survival motor neuron (SMN) polymorphism in relation to congenital arthrogryposis in two Piedmont calves (piemontese) Maria Longeri, Tania Perrone, Graziella Bongioni, Marco Bona, Marta Zanotti and Andrea Galli Genet. Sel. Evol., 35 Suppl. 1 (2003) S167-S175 DOI: 10.1051/gse:2003025