| 1. | Meyerding HW. Spondylolisthesis[J]. J Bone Joint Surg Am, 1931, 13(1):39-48. | 
				                                                        
				                                                            
				                                                                | 2. | Marchetti PG, Bartolozzi P. Classification of spondylolisthesis as a guideline for treatment[M]//Bridwell KH. The textbook of spinal surgery. Philidalphia:Lippincott Williams & Wilkins, 1997:1211-1254. | 
				                                                        
				                                                            
				                                                                | 3. | O'brien MF, Kuklo TR, Blanke KM, et al. Spinal deformity study group radiographic measurement manual[J]. Spine (Phila Pa 1976), 2004, 30(2):222-226. | 
				                                                        
				                                                            
				                                                                | 4. | Stoker GE, Buchowski JM, Zebala LP, et al. High-grade spondylolisthesis:surgical management in the pediatric and young adult patient[J]. ArgoSpine News & Journal, 2011, 23(1):33-42. | 
				                                                        
				                                                            
				                                                                | 5. | K?nig MA, Boszczyk BM. Limited access surgery for 360 degrees in-situ fusion in a dysraphic patient with high-grade spondylolisthesis[J]. Eur Spine J, 2012, 21(3):390-395. | 
				                                                        
				                                                            
				                                                                | 6. | Lian XF, Hou TS, Xu JG, et al. Single segment of posterior lumbar interbody fusion for adult isthmic spondylolisthesis:reduction or fusion in-situ[J]. Eur Spine J, 2014, 23(1):172-179. | 
				                                                        
				                                                            
				                                                                | 7. | Transfeldt EE, Mehbod AA. Evidence-based medicine analysis of isthmic spondylolisthesis treatment including reduction versus fusion in situ for high-grade slips[J]. Spine (Phila Pa 1976), 2007, 32(Suppl 19):S126-S129. | 
				                                                        
				                                                            
				                                                                | 8. | Martiniani M, Lamartina C, Specchia N. "In situ" fusion or reduction in high-grade high dysplastic developmental spondylolisthesis (HDSS)[J]. Eur Spine J, 2012, 21 (Suppl 1):S134-S140. | 
				                                                        
				                                                            
				                                                                | 9. | Ruf M, Koch H, Melcher RP, et al. Anatomic reduction and monosegmental fusion in high-grade developmental spondylolisthesis[J]. Spine (Phila Pa 1976), 2006, 31(3):269-274. | 
				                                                        
				                                                            
				                                                                | 10. | Shufflebarger HL, Geck MJ. High-grade isthmic dysplastic spondylolisthesis-Monosegmental surgical treatment[J]. Spine (Phila Pa 1976), 2005, 30(6, S):S42-S48. | 
				                                                        
				                                                            
				                                                                | 11. | Mac-Thiong JM, Wang Z, de Guise JA, et al. Postural model of sagittal spino-pelvic alignment and its relevance for lumbosacral developmental spondylolisthesis[J]. Spine (Phila Pa 1976), 2008, 33(21):2316-2325. | 
				                                                        
				                                                            
				                                                                | 12. | Lamartina C, Zavatsky JM, Petruzzi MA, et al. Novel concepts in the evaluation and treatment of high-dysplastic spondylolisthesis[J]. Eur Spine J, 2009, 18(Suppl 1):S133-S142. | 
				                                                        
				                                                            
				                                                                | 13. | Agabegi SS, Fischgrund JS. Contemporary management of isthmic spondylolisthesis:pediatric and adult[J]. Spine J, 2010, 10(6):530-543. | 
				                                                        
				                                                            
				                                                                | 14. | Seitsalo S. Operative and conservative treatment of moderate spondylolisthesis in young patients[J]. J Bone Joint Surg Br, 1990, 72(5):908-913. | 
				                                                        
				                                                            
				                                                                | 15. | Poussa M, Remes V, Lamberg T, et al. Treatment of severe spondylolisthesis in adolescence with reduction or fusion in situ:long-term clinical, radiologic, and functional outcome[J]. Spine (Phila Pa 1976), 2006, 31(5):583-590. | 
				                                                        
				                                                            
				                                                                | 16. | Schoenecker PL, Cole HO, Herring JA, et al. Cauda equina syndrome after in situ arthrodesis for severe spondylolisthesis at the lumbosacral junction[J]. J Bone Joint Surg Am, 1990, 72(3):369-377. | 
				                                                        
				                                                            
				                                                                | 17. | Hu SS, Bradford DS, Transfeldt EE, et al. Reduction of high-grade spondylolisthesis using Edwards instrumentation[J]. Spine (Phila Pa 1976), 1996, 21(3):367-371. | 
				                                                        
				                                                            
				                                                                | 18. | Molinari RW, Bridwell KH, Lenke LG, et al. Complications in the surgical treatment of pediatric high-grade, isthmic dysplastic spondylolisthesis:a comparison of three surgical approaches[J]. Spine (Phila Pa 1976), 1999, 24(16):1701-1711. | 
				                                                        
				                                                            
				                                                                | 19. | Tiusanen H, Schlenzka D, Seitsalo S, et al. Results of a trial of anterior or circumferential lumbar fusion in the treatment of severe isthmic spondylolisthesis in young patients[J]. J Pediatr Orthop B, 1996, 5(3):190-194. | 
				                                                        
				                                                            
				                                                                | 20. | Mac-Thiong JM, Labelle H. A proposal for a surgical classification of pediatric lumbosacral spondylolisthesis based on current literature[J]. Eur Spine J, 2006, 15(10):1425-1435. | 
				                                                        
				                                                            
				                                                                | 21. | Hresko MT, Labelle H, Roussouly PA. Classification of high-grade spondylolistheses based on pelvic version and spine balance: possible rationale for reduction[J]. Spine (Phila Pa 1976), 2007, 32(20):2208-2213. | 
				                                                        
				                                                            
				                                                                | 22. | Kasliwal MK, Smith JS, Kanter A, et al. Management of high-grade spondylolisthesis[J]. Neurosurg Clin N Am, 2013, 24(2):275-291. | 
				                                                        
				                                                            
				                                                                | 23. | Boxall D, Bradford DS, Winter RB, et al. Management of severe spondylolisthesis in children and adolescents[J]. J Bone Joint Surg Am, 1979, 61(4):479-495. | 
				                                                        
				                                                            
				                                                                | 24. | Zhou Z, Song Y, Cai Q, et al. Spontaneous resolution of scoliosis associated with lumbar spondylolisthesis[J]. Spine J, 2013, 13(5):e7-e10. | 
				                                                        
				                                                            
				                                                                | 25. | Umehara S, Zindrick MR, Patwardhan AG, et al. The biomechanical effect of postoperative hypolordosis in instrumented lumbar fusion on instrumented and adjacent spinal segments[J]. Spine (Phila Pa 1976), 2000, 25(13):1617-1624. | 
				                                                        
				                                                            
				                                                                | 26. | Akamaru T, Kawahara N, Yoon ST, et al. Adjacent segment motion after a simulated lumbar fusion in different sagittal alignments:a biomechanical analysis[J]. Spine (Phila Pa 1976), 2003, 28(14):1560-1566. | 
				                                                        
				                                                            
				                                                                | 27. | Okuda S, Iwasaki M, Miyauchi A, et al. Risk factors for adjacent segment degeneration after PLIF[J]. Spine (Phila Pa 1976), 2004, 29(14):1535-1540. | 
				                                                        
				                                                            
				                                                                | 28. | Zencica P, Chaloupka R, Hladíková J, et al. Adjacent segment degeneration after lumbosacral fusion in spondylolisthesis: a retrospective radiological and clinical analysis[J]. Acta Chir Orthop Traumatol Cech, 2010, 77(2):124-130. | 
				                                                        
				                                                            
				                                                                | 29. | Ghiselli G, Wang JC, Bhatia NN, et al. Adjacent segment degeneration in the lumbar spine[J]. J Bone Joint Surg Am, 2004, 86(7):1497-1503. | 
				                                                        
				                                                            
				                                                                | 30. | Park P, Garton HJ, Gala VC, et al. Adjacent segment disease after lumbar or lumbosacral fusion:review of the literature[J]. Spine (Phila Pa 1976), 2004, 29(17):1938-1944. | 
				                                                        
				                                                            
				                                                                | 31. | Miyakoshi N, Abe E, Shimada Y, et al. Outcome of one-level posterior lumbar interbody fusion for spondylolisthesis and postoperative intervertebral disc degeneration adjacent to the fusion[J]. Spine (Phila Pa 1976), 2000, 25(14):1837-1842. | 
				                                                        
				                                                            
				                                                                | 32. | Lamartina C. A square to indicate the unstable zone in severe spondylolisthesis[J]. Eur Spine J, 2001, 10(5):444-448. | 
				                                                        
				                                                            
				                                                                | 33. | Panjabi MM, Goel VK, Takata K. Physiologic strains in the lumbar spinal ligaments. An in Vitro biomechanical study 1981 Volvo Award in Biomechanics[J]. Spine (Phila Pa 1976), 1982, 7(3):192-203. | 
				                                                        
				                                                            
				                                                                | 34. | Asano S, Kaneda K, Umehara S, et al. The mechanical properties of the human L4-5 functional spinal unit during cyclic loading. The structural effects of the posterior elements[J]. Spine (Phila Pa 1976), 1992, 17(11):1343-1352. | 
				                                                        
				                                                            
				                                                                | 35. | Yang JY, Lee JK, Song HS. The impact of adjacent segment degeneration on the clinical outcome after lumbar spinal fusion[J]. Spine (Phila Pa 1976), 2008, 33(5):503-507. | 
				                                                        
				                                                            
				                                                                | 36. | Etebar S, Cahill DW. Risk factors for adjacent-segment failure following lumbar fixation with rigid instrumentation for degenerative instability[J]. J Neurosurg, 1999, 90(2 Suppl):163-169. |