1. World Health Organization. Safety of medicines. A guide to detecting and reporting adverse drug reactions–why health professionals need to take action. Geneva: World Health Organization; 2002.
2. World Health Organization. Safety monitoring of medicinal products: guideline for setting up and running a Pharmacovigilance Centre. Uppsala: Uppsala Monitoring Centre, World Health Organization; 2000.
3. World Health Organization. The importance of pharmacovigilance. Safety monitoring of medicinal products. Uppsala Monitoring Centre, World Health Organization; 2002.
4. The Uppsala monitoring system, WHO collaborating Centre for International Drug Monitoring World Health Organization; 2002.
5. Post marketing surveillance methodologies;Edlavitch;Drug Intell Clin Pharm,1988