Walton, F. Carl Udayakumar, S.P. Muck, William McIlwain, Charlton Kramer, Eric Jensen, Robert Ibrahim, Vivian Caliendo, Stephen Maynard Asher, Nhia (2011). The Routledge Companion to Race and Ethnicity. For occasion, in the U.K., it was proposed in 2011 that milk from tuberculosis-contaminated cattle must be allowed to enter the food chain.