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Howerth EW, Stallknecht DE, Dorminy M, Pisell T, Clarke GR.Howerth EW, et al.J Vet Diagn Invest. 1997 Apr;9(2):136-42. doi: 10.1177/104063879700900205.J Vet Diagn Invest. 1997.PMID: 9211231