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Kerkmann A, Ganter M, Frase R, Ostmeier M, Hewicker-Trautwein M, Distl O.Kerkmann A, et al.Berl Munch Tierarztl Wochenschr. 2010 Sep-Oct;123(9-10):413-21.Berl Munch Tierarztl Wochenschr. 2010.PMID: 21038812