7Fritsch EW,Heisel J, Rupp S. The failedback surgerysyndrome reasons,intraoperaive finding, and long - term results: a report of 182. Operative Treatment Spine, 1996,21:621-633.
9Petrie JL, Ross JS. Use of ADCON- L to inhibit postoperative peridural fibrosis and relafed symptoms following lumbar discsuvgery: a preliminavy report . Eur Spine J, 1996,5 (Suppl 1 ): 10-17.
10Smith SA, Massie JB, Chhesnut R, et al. Straight leg raising:anatomicaleffects on the spinal nerve root without and with fusion. Spine, 1993,18:992.