Source
Treatment of Nonmalignant Chronic Pain by DA Marcus (American Family Physician March 01, 2000, http://www.aafp.org/afp/20000301/1331.html)
American Academy of Pain Medicine. AAPM Facts and Figures on Pain. Accessed August 15, 2012
Written by familydoctor.org editorial staff
Reviewed/Updated: 11/10
Created: 03/00