Identification of risk factors for the prevalence and persistence of Salmonella in Belgian broiler chicken flocks., Namata, Harriet, Welby Sarah, Aerts Marc, Faes Christel, Abrahantes José Cortiñas, Imberechts Hein, Vermeersch Katie, Hooyberghs Jozef, Estelle Méroc, and Mintiens Koen , Prev Vet Med, 2009 Aug 01, Volume 90, Issue 3-4, p.211-22, (2009)