1. Chronic pain after surgery;Macrae;Br J Anaesth,2001
2. Classification of chronic pain. Descriptions of chronic pain syndromes and definitions of pain terms. Prepared by the International Association for the Study of Pain, Subcommittee on Taxonomy;Pain Suppl,1986
3. Chronic pain as an outcome of surgery;Perkins;Anesthesiology,2000
4. Portal da Saúde 2010. Disponível em: [http://portal.saude.gov.br/portal/saude/visualizar_texto.cfm?idtxt=21379] (Acesso em 01/10/2011).
5. Post cesarean analgesia: effective strategies and association with chronic pain;Lavand’homme;Curr Opin Anaesthesiol,2006