7Verbiest H. Stenosis of the lumbar vertebral eanal and seiatica[ J]. Neurosurg Rev, 1980, 3 (4) :75-81.
8Bulent O, Osman H G, Kursat O, et al. Effect of continuous lumbar traction on the size of herniated disc material in lumbar disc herniation [J].Rheumatology International, 2006, 26 (7) :622-626.