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1.) Nerve Block: Does It Work?
[ http://www.clevelandclinic.org/health/health-info/docs/0300/0325.asp?indexD17 ]
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2.) The Thoracic and Lumbar Sympatholysis.....Technique ... Complications ... Indications
[ http://emmanuel.brunet.free.fr/englishv/symp.htm ]
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3.) Nerve Blocks
[ http://www.helpforpain.com/arch2000may.htm ]
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4.) The Neurology and Neurosurgery Forum: Sympathetic Lumbar Injection
[ http://www.medhelp.org/perl6/neuro/archive/940.html ]
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5.) Cervical and Lumbar Sympathetic Nerve Block
http://www.spineuniverse.com/displayarticle.php/article1180.html