1. Maetzel A, Li L. The economic burden of low back pain: a review of studies published between 1996 and 2001. Best Pract Res Clin Rheumatol. 2002;16:23-30.
2. Hale ME, Dvergsten C, Gimbel J. Efficacy and safety of oxymorphone extended release in chronic low back pain. Results of a randomized, double-blind, placebo- and activecontrolled phase 111 study. J Pain. 2005;6:21-28.
3. Long A, Donelson R, Fung T. Does it matter which exercise? A randomized control trial of exercise for low back pain. Spine. 2004;29:2593-2602.
4. Shaughness~ M, Caulfield B. A pilot study to investigate the effect of lumbar stabilisation exercise training o functional ability and quality of life in patients with chronic low back pain. Int J Rehabil Res. 2004;27:297-301.
5. Leibing E, Leonhardt U, Koster G, et al. Acupuncture treatment of chronic low-back pain-a randomized, blinded, placebo-controlled trial with 9-month follow-up. Pain. 2002;96:189-196.
6. Assendelft WJ, Morton SC, Yu EI, Suttorp MJ, Shekelle PC. Spinal manipulative therapy for low back pain. Cochrane Database Syst Rev. 2004;1:CD000447.
7. Gay RE, Bronfort G, Evans RL. Distraction manipulation of the lumbar spine: a review of the literature. J Manipulative Physiol Ther. 2005;28:266-273.
8. van der Roer N, van Tulder MW, Barendse JM, et al. Cost-effectiveness of an intensive group training protocol
compared to physiotherapy guideline care for sub-acute and chronic low back pain: design of a randomised controlled trial with an economic evaluation. BMC Musculoskelet Disord. 2004;5:45.
9. Buttermann GR. The effect of spinal steroid injections for degenerative disc disease. Spine 1. 2004;4:495-505.
10. Ercelen 0, Bulutcu E, Oktenoglu T, et al. Radiofrequency lesioning using two different time modalities for the treatment of lumbar discogenic pain: a randomized trial. Spine. 2003;28:1922-1927.
11. Gupta RC, Ramarao SV. Epidurography in reduction of lumbar disc prolapse by traction. Arch Phys Med Rehabil. 1978;59:322-327.
12. One1 D, Tuzlaci M, Sari H, Demir K. Computed tomographic investigation of the effect of traction on lumbar disc herniations. Spine. 1989;14:82-90.
13. Ramos G, Martin W. Effects of vertebral axial decompression on intradiscal pressure. J Neurosurg. 1994; 81:350-353.
14. Guechev G, Guechev A. Fast dynamics of voluntary muscle strength and motor evoked potentials after traction therapy in patient with lumbosacral root lesion. Electromyogr Clin Neurophysiol. 1996;36:195-197.
15. Meszaros TF, Olson R, Kulig K, Creighton D, Czarnecki E. Effect of lo%, 30%, and 60% body weight traction on the straight leg raise test of symptomatic patients with low back pain. J Orthop Sports Phys Ther. 2000;30:595-601.
16. Harrison DE, Cailliet R, Harrison DD, Janik TJ, Holland B. Changes in sagittal lumbar configuration with a new method of extension traction: nonrandomized clinical controlled trial. Arch Phys Med Rehabil. 2002;83:1585- 1591.
17. Tesio L, Merlo A. Autotraction versus passive traction: an open controlled study in lumbar disc herniation. Arch Phys Med Rehabil. 1993;74:871-876.
18. Waddell G, McIntosh A, Hutchinson A, Feder G, Lewis M. Low Back Pain Evidence Review. London: Royal Coll General Practitioners; 1999.
19. Tekeoglu I, Adak B, Bozkurt M, Gurbuzoglu N. Distraction of lumbar vertebrae in gravitational traction. Spine. 1998;23:1061-1063.
20. Scheer SJ, Radack KL, O’Brien DR Jr. Randomized controlled trials in industrial low back pain relating to return to work. Part 2. Discogenic low back pain. Arch Phys Med Rehabil. 1996;77:1189-1197.
21. Koes BW, Bouter LM, van der Heijden GJ. Methodological quality of randomized clinical trials on treatment efficacy in low back pain. Spine. 1995;20:228-235.
22. van der Heijdan GJ, Beurskens AJ, Koes BW, Assendelft WJ, de Vet HC, Bouter LM. The efficacy of traction for back and neck pain: a systematic, blinded review of randomised clinical trial methods. Phys Ther. 1995;75:93- 104.
23. Harte AA, Baxter GD, Gracey JH. The efficacy of traction for back pain: a systematic review of randomized controlled trials. Arch Phys Med Rehabil. 2003;84:1542- 1553.
24. Mulrow CD, Cook DJ, eds. Systematic Reviews Synthesis of Best Evidence for Health Care Decisions. Philadelphia, PA: American College of Physicians; 1998.
25. Choi P, Halpern S, Malik N, et al. Examining the evidence in anesthesia literature: a critical appraisal of systematic reviews. Anesth Analg. 2001;92:700-709.
26. Cook DJ, Sackett DL, Spitzer WO. Methodological guidelines for systematic reviews of randomized control trials in healthcare from the Potsdam consultation on meta-analysis. J Clin Epidemiol. 1995;48:167-171.
27. van Tulder MW, Assendelft WJ, Koes BW, Bouter LM. Method guidelines for systematic reviews in the Cochrane Collaboration Back Review Group for Spinal Disorders. Spine. 1997;22:2323-2330.
28. Reust P, Chantraine A, Vischer TL. [Treatment of lumbar sciatica with or without neurological deficit using mechanical traction. A double-blind study]. Schwek Med Wochenschr. 1988;118:271-274.
29. van Tulder MW, Koes BW, Assendelft WJ, Bouter LM, Maljers LD, Driessen AP. [Chronic low back pain: exercise therapy, multidisciplinary programs, NSAID’s, back schools and behavioral therapy effective; traction not effective; results of systematic reviews]. Ned Tijdschr Geneeskd. 2000; 144:1489-1494.
30. Tesio L, Luccarelli G, Fornari M. Natchev’s autotraction for lumbago-sciatica: effectiveness in lumbar disc herniation. Arch Phys Med Rehabil. 1989;70:831-834.
31. Ljunggren EA, Weber H, Larsen S. Autotraction versus manual traction in patients with prolapsed lumbar intervertebral discs. Scand J Rehabil Med. 1984;16:117-124.
32. Shealy CN, Borgmeyer V. Decompression, reduction, and stabilization of the lumbar spine: a cost-effective treatment for lumbosacral pain. APM. 1997;7:63-65.
33. Swezey RL, Swezey AM, Warner K. Efficacy of home cervical traction therapy. Am J Phys Med Rehabil. 1999; 78:30-32.
34. Jadad AR, Moore A, Carroll D, et al. Assessing the quality of reports of randomised clinical trials: is blinding necessary? Control Clin Trials. 1996;17:1-12.
35. Carragee EJ, Alamin TF, Miller JL, Carragee JM. Discographic, MRI and psychosocial determinants of low back pain disability and remission: a prospective study in subjects with benign persistent back pain. Spine J. 2005;5:24-35.
36. Bloch R. Methodology in clinical back pain trials. Spine. 1987;12:430432.
37. Sherry E, Kitchener P, Smart R. A prospective randomized controlled study of VAX-D and TENS for the treatment of chronic low back pain. Neurol Res. 2001;23:780- 784.
38. Mathews JA, Mills SB, Jenkins VM, et al. Back pain and sciatica: controlled trials of manipulation, traction, sclerosant and epidural injections. BY J Rheumatol. 1987;26:416- 423.
39. Coxhead CE, Inskip H, Meade TW, North WR, Troup JD. Multicentre trial of physiotherapy in the management of sciatic symptoms. Lancet. 1981;16:1065-1068.
40. Werners R, Pynsent PB, Bulstrode CJ. Randomized trial comparing interferential therapy with motorized lumbar traction and massage in the management of low back pain in a primary care setting. Spine. 1999;24:1579-1584.
41. Borman P, Keskin D, Bodur H. The efficacy of lumbar traction in the management of patients with low back
pain. Rheumatol Int. 2003;23:82-86.
42. Mathews JA, Hickling J. Lumbar traction: a doubleblind controlled study for sciatica. Rheumatol Rehabil.,1975;14:222-225.
43. Beurskens AJ, de Vet HC, Koke AJ, et al. Efficacy of traction for nonspecific low back pain. 12-week and 6-month
results of a randomized clinical trial. Spine. 1997;22:2756- 2762.
44. Gionis TA, Groteke E. Spinal decompression. Orthopedic Techno1 Rev. 2003;5:36-39.
45. Gose EE, Naguszewski WK, Naguszewski RK. Vertebral axial decompression therapy for pain associated with herniated or degenerated discs or facet syndrome: an outcome study. Neurol Res. 1998;20:186-190.
46. Naguszewski WK, Naguszewski RK, Gose EE. Dermatomal somatosensory evoked potential demonstration of nerve root decompression after VAX-D therapy. Neurol Res. 2001;23:706-714.
47. Shealy CN, Koladia N, Wesemann M. Long-term effect analysis of IDD therapy in low back pain: a retrospective clinical pilot study. AJPM. 2005;15:93-97.
48. Matsui Y, Maeda M, Nakagami W, Iwata H. The involvement of matrix metalloproteinases and inflammation in lumbar disc herniation. Spine. 1998;23:863-868.
49. Fujita K, Nakagawa T, Hirabayashi K, Nagai Y. Neutral proteinases in human intervertebral disc. Role in degeneration and probable origin. Spine. 1993;18:1766-1773.
50. Judovich BD. Lumbar traction therapy: elimination of physical factors that prevent lumbar stretch. JAMA. 1955;159:549-550.