513962 ECOFFs epidemiological cut-off values 52 513963 ECOFFs epidemiological cut-offs 15 513966 ECOFFs Epidemiological cut-off values 5 513964 ECOFFs epidemiologic cut-off values 1 513965 ECOFFs Epidemiological cutoff values 1 513961 ECOFFs establish the wild-type cutoff values 1