Istituzioni internazionali di riferimento
- 10 Maggio 2007
- World Health Organization
http://www.who.int/en/ - Office International des Epizooties (OIE)
http://www.oie.int/eng/en_index.htm - Food and Agriculture Organization of the United Nations
http://www.fao.org/ - Centers for Disease Control and Prevention
http://www.cdc.gov/