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Janke BH, Francis DH, Collins JE, Libal MC, Zeman DH, Johnson DD, Neiger RD.Janke BH, et al. Among authors: zeman dh.J Am Vet Med Assoc. 1990 Mar 15;196(6):897-901.J Am Vet Med Assoc. 1990.PMID: 2179181