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Donaldson AI, Garland AJ, Ferris NP, Collen T.Donaldson AI, et al.Br Vet J. 1981 May-Jun;137(3):300-7. doi: 10.1016/s0007-1935(17)31692-5.Br Vet J. 1981.PMID: 6265024No abstract available.