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Tiwari, A., VanLeeuwen, J. A., Dohoo, I. R., Stryhn, H. E., & Keefe, G. P. (2003). Effects of seropositivity for bovine leukaemia virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum on the calving to conception interval in maritime Canadian dairy cattle. In S. W. J. Reid & F. D. Menzies (Eds.), Proceedings of a meeting held at University of Warwick, England, 31st March-2nd April 2003 (pp. 243-252). Atlantic Veterinary College, University of Prince Edward Island, 550, University Avenue, Charlottetown, PE C1A 4P3, Canada.: Society for Veterinary Epidemiology and Preventive Medicine.