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Grützner, Niels; Gebhart, Connie J; Lawhorn, Bruce D; Suchodolski, Jan S; Steiner, Jörg M (2015). Serum folate, cobalamin, homocysteine and methylmalonic acid concentrations in pigs with acute, chronic or subclinical Lawsonia intracellularis infection. Veterinary journal, 203(3), pp. 320-325. Elsevier 10.1016/j.tvjl.2014.12.022
