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Schuppers, M. E.; Frey, Caroline; Gottstein, Bruno; Stärk, K. D. C.; Kihm, U.; Regula, Gertraud (2010). Comparing the demonstration of freedom from Trichinella infection of domestic pigs by traditional and risk-based surveillance. Epidemiology and infection, 138(09), pp. 1242-1251. Cambridge: Cambridge University Press 10.1017/S0950268809991518
