Associations between a decreased veterinary antimicrobial use and resistance in commensal  Escherichia coli  from Belgian livestock species (2011?2015), Callens, Bénédicte, Cargnel Mickael, Sarrazin Steven, Dewulf Jeroen, Hoet Bart, Vermeersch Katie, Wattiau P, and Welby Sarah , Preventive Veterinary Medicine, Jan-09-2018, Volume 157, (2018)