1. Analgesics, antirheumatics and drugs for the treatment of gout. In Drug Benefits and Risks International Text book of Clinical Pharmacology, , (eds). John Wiley & Sons Ltd: West Sussex, UK, 2001; 387–395.
2. Clinical Pharmacology of Tramadol
3. Iran Drug Regulatory Authority, Under-secretary for Food & Drug Affairs, Ministry of Health. Drug Statistics. 1998.
4. World Health Organization. Safety monitoring of medical products. Guidline for setting up and running of a Pharmacovigilance center. Geneva, 1996, 19.
5. Causal or Casual?