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Rikhotso BO, Stoltsz WH, Bryson NR, Sommerville JE.Rikhotso BO, et al. Among authors: stoltsz wh.J S Afr Vet Assoc. 2005 Dec;76(4):217-23. doi: 10.4102/jsava.v76i4.430.J S Afr Vet Assoc. 2005.PMID: 16642719