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Little DA, van der Grinten P, Dwinger RH, Agyemang K, Kora S.Little DA, et al. Among authors: dwinger rh.Trop Anim Health Prod. 1991 May;23(2):126-32. doi: 10.1007/BF02361198.Trop Anim Health Prod. 1991.PMID: 1858165