Surgical vs Nonoperative Treatment for Lumbar Disk Herniation. The Spine Patient Outcome Research Trial (SPORT): A Randomized Trial.
JAMA 296:2441-2450, Weinstein,J.N.,et al, 2006
Sciatica:Which Intervention?
BMJ 319:302-303, Samanta,A.&Beardsley,J., 1999