Mejdahl, M.K., et al.
http://www.bmj.com/highwire/filestream/640586/field_highwire_article_pdf/0/bmj.f1865.full.pdf
Objective: Toexamine thedevelopment of persistent pain after treatment for breast cancer and to examine risk factors associated with continuing pain.Design: Repeated cross sectional study in a previously examined
nationwide cohort.All eligible women who underwent surgery for primary breast cancer in Denmark in 2005 and 2006 and were examined in 2008 were surveyed again with the same questionnaire.
