1. Voltaire (Francois-Marie Arouet). Candide, quoted in the Oxford Textbook of Quotations
2. Karch FE, Smith CL, Kernzer B, et al. Adverse drug reactions—a matter of opinion. Adverse drug reactions—a matter of opinion. 1976;19:489–493.
3. World Health Organization. International drug monitoring: the role of national centres Technical report series No. 498. Geneva, Switzerland: World Health Organization; 1972.
4. Edwards IR, Aronson JK. Adverse drug reactions: definitions, diagnosis, and management. Adverse drug reactions: definitions, diagnosis, and management. 2000;356:1255–1259.
5. Ferner RE, Aronson JK. Errors in prescribing, preparing, and giving medicines: definition, classification, and prevention. In: Aronson JK, ed. Side Effects of Drugs Annual 22nd ed. Amsterdam: Elsevier; 1999:xxiii–xvi.