Surgical and nonsurgical management of lumbar spinal stenos's: foumear outcomes from the matte lumbar spine study. Spine 25.556-562 (20001. 101. Malmivaara. A. et at. Surgical or nonoperative treatment for lumbar spinal stenosis? A randomized controlled trial. Spne 32. 1-8 (2007). 102. Deyo. R. A.. C