Datta, Sukdeb An updated systematic review of the diagnostic utility of selective nerve root blocks. [electronic resource] - Pain physician Jan 2007 - 113-28 p. digital Publication Type: Journal Article; Review; Systematic Review ISSN: 1533-3159 Subjects--Topical Terms: Back Pain--diagnosisClinical Trials as TopicHumansInjections, SpinalNerve BlockSpinal Nerve Roots--drug effects