1. The new classification system for slaughter-pig herds in the Danish Salmonella Surveillance-and-Control Program;Alban;Prev. Vet. Med.,2002
2. Survival Analysis Using the SAS System: A Practical Guide;Allison,1995
3. The community summary report on trends and sources of zoonoses, zoonotic agents, antimicrobial resistance and foodborne outbreaks in the European Union in 2006;Anon;EFSA J.,2007
4. Opinion of the scientific panel on biological hazards on “Risk assessment and mitigation options of Salmonella in pig production”;Anon;EFSA J.,2006
5. Anon, 2006b. Annual Report on Zoonoses in Denmark. Technical University of Denmark, Denmark, pp. 13–15.