1. How much is Medicare spending on anesthesia services?;Bierstein;ASA Newsl,2001
2. Increases in lumbosacral injections in the Medicare population: 1994 to 2001;Friedly;Spine,2007
3. Chronic pain management;Fitzgibbon;Anesthesiology,2004
4. Trends in chronic pain management malpractice claims;Liau;Anesthesiology,2007
5. Black's Law Dictionary;Black,1990