2David S> Hersh MD,Yong H,et al. Multi-level spondylol-ysis. A case report and review of the literature[J], BullNYU Joint Dis,2011,69(4):339-343.
3Chung CH? Chiu HM, Wang SJ,et al. Direct repair ofmultiple levels lumbar spondylolysis by pedicle screwlaminar hook and bone grafting:clinical,CT,and MRI-as-sessed study[J]. J Spinal Disord Tech,2007,20 (5) : 399-402.
4Ogawa H,Nishimoto H? Hosoe H,et al. Clinical outcomeafter segmental wire fixation and bone grafting for repairof the defects in multiple level lumbar spondylolysis匸J3. JSpinal Disord Tech,2007 ,20(7) : 521-525.
5Chang JH,Lee CH,Wu SS.et al. Management of multiplelevel spondylolysis of the lumbar spine in young males: areport of six cases[J3. J Formos Med Assoc, 2001, 100(7):497-502.
6Roca J, Iborra M, Cavanilles-Walker JM, et al. Direct re-pair of spondylolysis using a new pedicle screw hook fixa-tion: clinical and CT-assessed study: an analysis of 19 pa-tients[J].J Spinal Disord Tech,2005,18 Suppl:S82-89.
7Eingorn D, Pizzutillo PD. Pars interarticularis fusion ofmultiple levels of lumbar spondylolysis. A case report[J]. SpineCPhila Pa 1976),1985,10(3): 250-252.
8Wong LC. Rehabilitation of a patient with a rare multi-level isthmic spondylolisthesis: a case report [J]. J CanChiropr Assoc,2004,48(2) ; 142-151.
9Dai LY. Disc degeneration in patients with lumbar spon-dylolysis[J]. J Spinal Disord,2000,13(6) :478-486.
10Pfirrmann CW, Metzdorf A, Zanetti M, et al. Magnetic resonance classification of lumbar intervertebral disc degeneration[J]. Spine, 2001,26(17) :1873-1878.
