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Roberts N, Palmer B, Hickford JG, Bickerstaffe R.Roberts N, et al. Among authors: hickford jg.Anim Genet. 1996 Jun;27(3):211. doi: 10.1111/j.1365-2052.1996.tb00955.x.Anim Genet. 1996.PMID: 8759125No abstract available.