A longitudinal study reveals persistence of antimicrobial resistance on livestock farms is not due to antimicrobial usage alone oleh Richard P. Smith, Hannah E. May, Manal AbuOun, Emma Stubberfield, Daniel Gilson, Kevin K. Chau, Derrick W. Crook, Derrick W. Crook, Derrick W. Crook, Liam P. Shaw, Daniel S. Read, Nicole Stoesser, Nicole Stoesser, Nicole Stoesser, Maria Jose Vilar, Muna F. Anjum