A critical review of the American Pain Society clinical practice guidelines for interventional techniques: part 2. Therapeutic interventions.
Manchikanti L, Datta S, Gupta S, Munglani R, Bryce DA, Ward SP, Benyamin RM, Sharma ML, Helm S, Fellows B, Hirsch JA. A critical review of the American Pain Society clinical practice guidelines for interventional techniques: part 2. Therapeutic interventions. Pain Physician. 2010 Jul-Aug; 13(4):E215-64.