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Howard S. An, MD

Specialty:
  • Orthopedic Surgery
Board Certification:
  • Orthopaedic Surgery
Faculty Rank: Professor
Medical or Graduate Education: Medical College of Ohio
Residency: Medical College of Ohio - Orthopedic Surgery
Fellowship: Thomas Jefferson University Hospital - Spinal Surgery
Clinical Expertise:
  • Degenerative disc disease
  • Herniated disc
  • Scoliosis
  • Scoliosis surgery
  • Spine surgery
  • Spine surgery, minimally invasive
Research Interests:
  • Tissue engineering of the intervertebral disc
  • Spinal biomechanics
Languages Spoken:
  • Korean
Google Map
  • Midwest Orthopaedics at Rush
  • Orthopedic Building
  • 1611 W. Harrison St.
  • Suite 400
  • Chicago, IL  60612
  • Phone: (312) 243-4244
  • Fax: (708) 409-5179
  • View Larger MapDriving Directions

Below is a list of scientific publications for which this practitioner was either the primary author or a contributor. Citations come from PubMed, a database of biomedical literature, life science journals and online books. PubMed is a service of the US Library of Medicine at the National Institutes of Health. Click on the title of the cited work for more information (this will take you directly to PubMed.gov). Listings go back five years.

  1. In Vivo Three-Dimensional Morphometric Analysis of the Lumbar Foramen in Healthy Subjects.
    Senoo I, Espinoza Orías AA, An HS, Andersson GB, Park DK, Triano JJ, Inoue N
    Spine
    2014 May 12
  2. Histological features of endplates of the mammalian spine: from mice to men.
    Zhang Y, Lenart BA, Lee JK, Chen D, Shi P, Ren J, Muehleman C, Chen D, An HS
    Spine
    2014 Mar 1
    39(5):E312-7.
  3. Complications with the use of bone morphogenetic protein 2 (BMP-2) in spine surgery.
    Tannoury CA, An HS
    Spine J
    2014 Mar 1
    14(3):552-9.
  4. Cytotoxicity of local anesthetics and nonionic contrast agents on bovine intervertebral disc cells cultured in a three-dimensional culture system.
    Chee AV, Ren J, Lenart BA, Chen EY, Zhang Y, An HS
    Spine J
    2014 Mar 1
    14(3):491-8.
  5. Fibronectin Fragments and the Cleaving Enzyme ADAM-8 in the Degenerative Human Intervertebral Disc.
    Ruel N, Markova DZ, Adams SL, Scanzello C, Cs-Szabo G, Gerard D, Shi P, Anderson DG, Zack M, An HS, Chen D, Zhang Y
    Spine
    2014 Jul 15
    39(16):1274-9.
    eng
  6. Surgical treatment for ossification of the posterior longitudinal ligament in the cervical spine.
    An HS, Al-Shihabi L, Kurd M
    J Am Acad Orthop Surg
    2014 Jul
    22(7):420-9.
    eng
  7. Spontaneous resorption of a large cervical herniated nucleus pulposus.
    Cvetanovich GL, Hsu AR, Frank RM, An HS, Andersson GB
    Am J. Orthop.
    2014 Jul
    43(7):E140-5.
    eng
  8. Damage accumulation location under cyclic loading in the lumbar disc shifts from inner annulus lamellae to peripheral annulus with increasing disc degeneration.
    Qasim M, Natarajan RN, An HS, Andersson GB
    J Biomech
    2014 Jan 3
    47(1):24-31.
  9. A Biomechanical Comparison of Three Different Posterior Fixation Constructs Used for C6-C7 Cervical Spine Immobilization: A Finite Element Study.
    Hong JT, Qasim M, Espinoza Orías AA, Natarajan RN, An HS
    Neurol. Med. Chir. (Tokyo)
    2014 Jan 10
  10. Relationship between biomechanical changes at adjacent segments and number of fused bone grafts in multilevel cervical fusions: a finite element investigation.
    Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB
    J Neurosurg Spine
    2014 Jan
    20(1):22-9.
  11. A radical procedure of circumferential spinal cord decompression through a modified posterior approach for thoracic myelopathy caused by severely impinging anterior ossification.
    Ma X, An HS, Zhang Y, Brown NM, Chen Z, Zhang G, Xiang H, Hu Y, Chen B
    Spine J
    2014 Apr
    14(4):651-8.
  12. Human Umbilical Cord Blood-Derived Mesenchymal Stem Cells in the Cultured Rabbit Intervertebral Disc: A Novel Cell Source for Disc Repair.
    Anderson DG, Markova D, An HS, Chee A, Enomoto-Iwamoto M, Markov V, Saitta B, Shi P, Gupta C, Zhang Y.
    Am J Phys Med Rehabil. 2013
    2013 May
    92(5):420-429.
  13. Cervical spine manifestations in patients with inflammatory arthritides.
    Cha TD, An HS.
    Nat Rev Rheumatol. 2013
    2013 Mar 26. doi: 10.1038/nrrheum.2013.40. [Epub ahead of print]
  14. Retroperitoneal approach to the intervertebral disc for the annular puncture model of intervertebral disc degeneration in the rabbit.
    Moss IL, Zhang Y, Shi P, Chee A, Piel MJ, An HS.
    Spine J. 2013
    2013 Mar
    13(3):229-34. doi: 10.1016/j.spinee.2012.02.028. Epub 2013 Jan 29.
  15. A Biomechanical Comparison of Intralaminar C7 Screw Constructs with and without Offset Connector Used for C6-7 Cervical Spine Immobilization : A Finite Element Study.
    Qasim M, Hong JT, Natarajan RN, An HS
    J Korean Neurosurg Soc
    2013 Jun
    53(6):331-6.
  16. Lactoferricin enhances BMP7-stimulated anabolic pathways in intervertebral disc cells.
    Ellman MB, Kim J, An HS, Chen D, Kc R, Li X, Xiao G, Yan D, Suh J, van Wjnen AJ, Wang JH, Kim SG, Im HJ.
    Gene. 2013
    2013 Jul 25
    524(2):282-91. doi: 10.1016/j.gene.2013.04.003. Epub 2013 Apr 30.
  17. Biomechanics of adjacent segments after a multilevel cervical corpectomy using anterior, posterior, and combined anterior-posterior instrumentation techniques: a finite element model study.
    Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB.
    Spine J. 2013
    2013 Apr 9. doi:pii: S1529-9430(13)00262-3. 10.1016/j.spinee.2013.02.062. [Epub ahead of print]
  18. Toll-like receptor adaptor signaling molecule MyD88 on intervertebral disk homeostasis: in vitro, ex vivo studies.
    Ellman MB, Kim JS, An HS, Chen D, KC R, An J, Dittakavi T, van Wijnen AJ, Cs-Szabo G, Li X, Xiao G, An S, Kim SG, Im HJ.
    Gene. 2012
    2012 Sep 1
    505(2):283-90. doi: 10.1016/j.gene.2012.06.004. Epub 2012 Jun 10.
  19. Grafton and local bone have comparable outcomes to iliac crest bone in instrumented single-level lumbar fusions.
    Kang J, An H, Hilibrand A, Yoon ST, Kavanagh E, Boden S.
    Spine (Phila Pa 1976). 2012
    2012 May 20
    37(12):1083-91. doi: 10.1097/BRS.0b013e31823ed817.
  20. Biomechanical comparison of occiput-C1-C2 fixation techniques: C0-C1 transarticular screw and direct occiput condyle screw.
    Takigawa T, Simon P, Espinoza Orías AA, Hong JT, Ito Y, Inoue N, An HS.
    Spine (Phila Pa 1976). 2012
    2012 May 20
    37(12):E696-701. doi: 10.1097/BRS.0b013e3182436669.
  21. In vivo topographic analysis of lumbar facet joint space width distribution in healthy and symptomatic subjects.
    Simon P, Espinoza Orías AA, Andersson GB, An HS, Inoue N.
    Spine (Phila Pa 1976). 2012
    2012 May 20
    37(12):1058-64. doi: 10.1097/BRS.0b013e3182552ec9.
  22. Corpectomy versus discectomy for the treatment of multilevel cervical spine pathology: a finite element model analysis.
    Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB.
    Spine J. 2012
    2012 May
    12(5):401-8. doi: 10.1016/j.spinee.2012.03.025. Epub 2012 May 8.
  23. Factors affecting reoperations after anterior cervical discectomy and fusion within and outside of a Federal Drug Administration investigational device exemption cervical disc replacement trial.
    Singh K, Phillips FM, Park DK, Pelton MA, An HS, Goldberg EJ.
    Spine J. 2012
    2012 May
    12(5):372-8. doi: 10.1016/j.spinee.2012.02.005. Epub 2012 Mar 16.
  24. The pathophysiologic role of the protein kinase Cδ pathway in the intervertebral discs of rabbits and mice: in vitro, ex vivo, and in vivo studies.
    Ellman MB, Kim JS, An HS, Kroin JS, Li X, Chen D, Yan D, Buechter DD, Nakayama K, Liu B, Morgan S, Im HJ.
    Arthritis Rheum. 2012
    2012 Jun
    64(6):1950-9. doi: 10.1002/art.34337. Epub 2011 Dec 12.
  25. Cervical pedicle subtraction osteotomy for fixed flexion deformities.
    Khan SN, Braaksma B, An HS.
    Orthopedics. 2012
    2012 Jun
    35(6):484-9. doi: 10.3928/01477447-20120525-04.
  26. Posterior facet load changes in adjacent segments due to moderate and severe degeneration in C5-C6 disc: a poroelastic C3-T1 finite element model study.
    Hussain M, Natarajan RN, Chaudhary G, An HS, Andersson GB.
    J Spinal Disord Tech. 2012
    2012 Jun
    25(4):218-25. doi: 10.1097/BSD.0b013e3182159776.
  27. Initiation and progression of mechanical damage in the intervertebral disc under cyclic loading using continuum damage mechanics methodology: A finite element study.
    Qasim M, Natarajan RN, An HS, Andersson GB.
    J Biomech. 2012
    2012 Jul 26
    45(11):1934-40. doi: 10.1016/j.jbiomech.2012.05.022. Epub 2012 Jun 8.
  28. New treatments and imaging strategies in degenerative disease of the intervertebral disks.
    Lotz JC, Haughton V, Boden SD, An HS, Kang JD, Masuda K, Freemont A, Berven S, Sengupta DK, Tanenbaum L, Maurer P, Ranganathan A, Alavi A, Marinelli NL.
    Radiology. 2012
    2012 Jul
    264(1):6-19. doi: 10.1148/radiol.12110339. Review.
  29. C1-C2 posterior fixation: indications, technique, and results.
    Jacobson ME, Khan SN, An HS.
    Orthop Clin North Am. 2012
    2012 Jan
    43(1):11-8, vii. doi: 10.1016/j.ocl.2011.09.004. Review.
  30. Commentary: Total disc arthroplasty and the bearing surface debate.
    Jacobs JJ, An HS.
    Spine J. 2012
    2012 Aug
    12(8):702-4. doi: 10.1016/j.spinee.2011.10.022. No abstract available.
  31. Histological features of the degenerating intervertebral disc in a goat disc-injury model.
    Zhang Y, Drapeau S, An HS, Markova D, Lenart BA, Anderson DG.
    Spine (Phila Pa 1976). 2011
    2011 Sep 1
    36(19):1519-27. doi: 10.1097/BRS.0b013e3181f60b39.
  32. Relative contributions of strain-dependent permeability and fixed charged density of proteoglycans in predicting cervical disc biomechanics: a poroelastic C5-C6 finite element model study.
    Hussain M, Natarajan RN, Chaudhary G, An HS, Andersson GB.
    Med Eng Phys. 2011
    2011 May
    33(4):438-45. doi: 10.1016/j.medengphy.2010.11.011. Epub 2010 Dec 16.
  33. Biomechanical comparison of three different types of C7 fixation techniques.
    Hong JT, Tomoyuki T, Udayakumar R, Espinoza Orías AA, Inoue N, An HS.
    Spine (Phila Pa 1976). 2011
    2011 Mar 1
    36(5):393-8. doi: 10.1097/BRS.0b013e3181d345e0. No abstract available.
  34. Intervertebral disk repair by protein, gene, or cell injection: a framework for rehabilitation-focused biologics in the spine.
    Zhang Y, Chee A, Thonar EJ, An HS.
    PM R. 2011
    2011 Jun
    3(6 Suppl 1):S88-94. doi: 10.1016/j.pmrj.2011.04.020. Review. Erratum in: PM R. 2011 Aug;3(8):783.
  35. Biologic repair and regeneration of the intervertebral disk.
    An HS, Masuda K, Cs-Szabo G, Zhang Y, Chee A, Andersson GB, Im HJ, Thonar EJ, Kwon YM.
    J Am Acad Orthop Surg. 2011
    2011 Jul
    19(7):450-2. Review. No abstract available.
  36. In vivo measurement of the subchondral bone thickness of lumbar facet joint using magnetic resonance imaging
    Duan CY, Espinoza Orías AA, Shott S, An HS, Andersson GB, Hu JZ, Lu HB, Inoue N
    Osteoarthritis Cartilage
    2011 Jan
    19(1):96-102
  37. Simulation of inhomogeneous rather than homogeneous poroelastic tissue material properties within disc annulus and nucleus better predicts cervical spine response: a C3-T1 finite element model analysis under compression and moment loadings.
    Hussain M, Natarajan RN, Chaudhary G, An HS, Andersson GB.
    Spine (Phila Pa 1976). 2011
    2011 Feb 15
    36(4):E245-55. doi: 10.1097/BRS.0b013e3181f2af72.
  38. The effects of age, sex, ethnicity, and spinal level on the rate of intervertebral disc degeneration: a review of 1712 intervertebral discs.
    Siemionow K, An H, Masuda K, Andersson G, Cs-Szabo G.
    Spine (Phila Pa 1976). 2011
    2011 Aug 1
    36(17):1333-9. doi: 10.1097/BRS.0b013e3181f2a177.
  39. Biomechanical effects of anterior, posterior, and combined anterior-posterior instrumentation techniques on the stability of a multilevel cervical corpectomy construct: a finite element model analysis.
    Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB.
    Spine J. 2011
    2011 Apr
    11(4):324-30. doi: 10.1016/j.spinee.2011.02.008.
  40. The rat intervertebral disk degeneration pain model: relationships between biological and structural alterations and pain.
    Kim JS, Kroin JS, Li X, An HS, Buvanendran A, Yan D, Tuman KJ, van Wijnen AJ, Chen D, Im HJ.
    Arthritis Res Ther. 2011
    2011
    13(5):R165. doi: 10.1186/ar3485. Epub 2011 Oct 13.
  41. Spinal kinematics and facet load transmission after total disc replacement.
    Takigawa T, Espinoza Orías AA, An HS, Gohgi S, Udayakumar RK, Sugisaki K, Natarajan RN, Wimmer MA, Inoue N.
    Spine (Phila Pa 1976). 2010
    2010 Oct 15
    35(22):E1160-6. doi: 10.1097/BRS.0b013e3181e5352d.
  42. Biomechanical Comparison of Three Different Types of C7 Fixation Techniques: Lateral Mass Screw, Transpedicular Screw, and Intralaminar Screw
    Hong JT, Tomoyuki T, Udayakumar R, Espinoza Orías AA, Inoue N, An HS
    Spine (Phila Pa 1976)
    2010 Oct 14
  43. Three-dimensional morphology and kinematics of the craniovertebral junction in rheumatoid arthritis.
    Takatori R, Tokunaga D, Hase H, Mikami Y, Ikeda T, Harada T, Imai K, Ito H, Nishimura T, An HS, Inoue N, Kubo T.
    Spine (Phila Pa 1976). 2010
    2010 Nov 1
    35(23):E1278-84. doi: 10.1097/BRS.0b013e3181e6d578.
  44. Surgical versus nonoperative treatment for lumbar spinal stenosis four-year results of the Spine Patient Outcomes Research Trial.
    Weinstein JN, Tosteson TD, Lurie JD, Tosteson A, Blood E, Herkowitz H, Cammisa F, Albert T, Boden SD, Hilibrand A, Goldberg H, Berven S, An H.
    Spine (Phila Pa 1976). 2010
    2010 Jun 15
    35(14):1329-38. doi: 10.1097/BRS.0b013e3181e0f04d.
  45. The relationship of intrapsoas nerves during a transpsoas approach to the lumbar spine: anatomic study.
    Park DK, Lee MJ, Lin EL, Singh K, An HS, Phillips FM.
    J Spinal Disord Tech. 2010
    2010 Jun
    23(4):223-8. doi: 10.1097/BSD.0b013e3181a9d540.
  46. Does multilevel lumbar stenosis lead to poorer outcomes?: a subanalysis of the Spine Patient Outcomes Research Trial (SPORT) lumbar stenosis study.
    Park DK, An HS, Lurie JD, Zhao W, Tosteson A, Tosteson TD, Herkowitz H, Errico T, Weinstein JN.
    Spine (Phila Pa 1976). 2010
    2010 Feb 15
    35(4):439-46. doi: 10.1097/BRS.0b013e3181bdafb9.
  47. Insulin-like growth factor 1 synergizes with bone morphogenetic protein 7-mediated anabolism in bovine intervertebral disc cells.
    Kim JS, Ellman MB, An HS, van Wijnen AJ, Borgia JA, Im HJ.
    Arthritis Rheum. 2010
    2010 Dec
    62(12):3706-15. doi: 10.1002/art.27733.
  48. Reduction in segmental flexibility because of disc degeneration is accompanied by higher changes in facet loads than changes in disc pressure: a poroelastic C5-C6 finite element investigation.
    Hussain M, Natarajan RN, An HS, Andersson GB.
    Spine J. 2010
    2010 Dec
    10(12):1069-77. doi: 10.1016/j.spinee.2010.09.012.
  49. Patterns of height changes in anterior and posterior cervical disc regions affects the contact loading at posterior facets during moderate and severe disc degeneration: a poroelastic C5-C6 finite element model study.
    Hussain M, Natarajan RN, An HS, Andersson GB.
    Spine (Phila Pa 1976). 2010
    2010 Aug 15
    35(18):E873-81. doi: 10.1097/BRS.0b013e3181dc60a9.
  50. Fibronectin splicing variants in human intervertebral disc and association with disc degeneration.
    Anderson DG, Markova D, Adams SL, Pacifici M, An HS, Zhang Y.
    Spine (Phila Pa 1976). 2010
    2010 Aug 1
    35(17):1581-8. doi: 10.1097/BRS.0b013e3181c6ef1a.
  51. Motion changes in adjacent segments due to moderate and severe degeneration in C5-C6 disc: a poroelastic C3-T1 finite element model study.
    Hussain M, Natarajan RN, An HS, Andersson GB.
    Spine (Phila Pa 1976). 2010
    2010 Apr 20
    35(9):939-47. doi: 10.1097/BRS.0b013e3181bd419b.
  52. In vivo measurement of lumbar facet joint area in asymptomatic and chronic low back pain subjects.
    Otsuka Y, An HS, Ochia RS, Andersson GB, Espinoza Orías AA, Inoue N.
    Spine (Phila Pa 1976). 2010
    2010 Apr 15
    35(8):924-8. doi: 10.1097/BRS.0b013e3181c9fc04.
  53. En bloc spondylectomy for the treatment of spinal tuberculosis with fixed and sharply angulated kyphotic deformity.
    Deng Y, Lv G, An HS.
    Spine (Phila Pa 1976). 2009
    2009 Sep 15
    34(20):2140-6. doi: 10.1097/BRS.0b013e3181b34ce7.
  54. In vivo three-dimensional morphometric analysis of the lumbar pedicle isthmus.
    Sugisaki K, An HS, Espinoza Orías AA, Rhim R, Andersson GB, Inoue N.
    Spine (Phila Pa 1976). 2009
    2009 Nov 15
    34(24):2599-604. doi: 10.1097/BRS.0b013e3181b52a37.
  55. Primary bovine intervertebral disc cells transduced with adenovirus overexpressing 12 BMPs and Sox9 maintain appropriate phenotype.
    Zhang Y, Markova D, Im HJ, Hu W, Thonar EJ, He TC, An HS, Phillips FM, Anderson DG.
    Am J Phys Med Rehabil. 2009
    2009 Jun
    88(6):455-63. doi: 10.1097/PHM.0b013e3181a5f0aa.
  56. Age-related changes in the extracellular matrix of nucleus pulposus and anulus fibrosus of human intervertebral disc.
    Singh K, Masuda K, Thonar EJ, An HS, Cs-Szabo G.
    Spine (Phila Pa 1976). 2009
    2009 Jan 1
    34(1):10-6. doi: 10.1097/BRS.0b013e31818e5ddd.
  57. Screw angulation affects bone-screw stresses and bone graft load sharing in anterior cervical corpectomy fusion with a rigid screw-plate construct: a finite element model study.
    Hussain M, Natarajan RN, Fayyazi AH, Braaksma BR, Andersson GB, An HS.
    Spine J. 2009
    2009 Dec
    9(12):1016-23. doi: 10.1016/j.spinee.2009.08.461. Epub 2009 Oct 9.
  58. Making ethical decisions in current orthopedic practice.
    An HS.
    Am J Orthop (Belle Mead NJ). 2009
    2009 Aug
    38(8):382-3. No abstract available.
  59. Notochordal cells stimulate migration of cartilage end plate chondrocytes of the intervertebral disc in in vitro cell migration assays.
    Kim KW, Ha KY, Lee JS, Nam SW, Woo YK, Lim TH, An HS.
    Spine J. 2009
    2009 Apr
    9(4):323-9. doi: 10.1016/j.spinee.2008.05.003. Epub 2008 Jul 10.
  60. Problems related to cervical fusion: malalignment and nonunion.
    Park DK, An HS.
    Instr Course Lect. 2009
    2009
    58:737-45.
  61. Biological treatment for degenerative disc disease: implications for the field of physical medicine and rehabilitation.
    Zhang Y, An HS, Tannoury C, Thonar EJ, Freedman MK, Anderson DG.
    Am J Phys Med Rehabil. 2008
    2008 Sep
    87(9):694-702. doi: 10.1097/PHM.0b013e31817c1945. Review.
  62. Anatomical variations of the vertebral artery segment in the lower cervical spine: analysis by three-dimensional computed tomography angiography.
    Hong JT, Park DK, Lee MJ, Kim SW, An HS.
    Spine (Phila Pa 1976). 2008
    2008 Oct 15
    33(22):2422-6. doi: 10.1097/BRS.0b013e31818938d1.
  63. The action of resveratrol, a phytoestrogen found in grapes, on the intervertebral disc.
    Li X, Phillips FM, An HS, Ellman M, Thonar EJ, Wu W, Park D, Im HJ.
    Spine (Phila Pa 1976). 2008
    2008 Nov 15
    33(24):2586-95. doi: 10.1097/BRS.0b013e3181883883.
  64. Vertebroplasty comparing injectable calcium phosphate cement compared with polymethylmethacrylate in a unique canine vertebral body large defect model.
    Turner TM, Urban RM, Singh K, Hall DJ, Renner SM, Lim TH, Tomlinson MJ, An HS.
    Spine J. 2008
    2008 May-Jun
    8(3):482-7. doi: 10.1016/j.spinee.2006.12.007. Epub 2007 Mar 5.
  65. In vivo segmental motion of the cervical spine in rheumatoid arthritis patients with atlantoaxial subluxation
    Takatori R, Tokunaga D, Inoue N, Hase H, Harada T, Suzuki H, Ito H, Nishimura T, An HS, Kubo T
    Clin Exp Rheumatol
    2008 May-Jun
    26(3):442-8
  66. Lumbar spinal stenosis.
    Singh K, Samartzis D, Biyani A, An HS.
    J Am Acad Orthop Surg. 2008
    2008 Mar
    16(3):171-6. No abstract available.
  67. Orthopedic surgeon in the ER: the importance of remembering the basics.
    An HS.
    Am J Orthop (Belle Mead NJ). 2008
    2008 Mar
    37(3):E46. No abstract available.
  68. Cervical kyphosis and thoracic lordoscoliosis in a patient with cerebral palsy.
    Singh K, Samartzis D, Somera AL, An HS.
    Orthopedics. 2008
    2008 Mar
    31(3):276.
  69. Effect of osteogenic protein-1 on the matrix metabolism of bovine tendon cells
    Yamada M, Akeda K, Asanuma K, Thonar EJ, An HS, Uchida A, Masuda K
    J Orthop Res
    2008 Jan
    26(1):42-8
  70. Surgical versus nonsurgical therapy for lumbar spinal stenosis.
    Weinstein JN, Tosteson TD, Lurie JD, Tosteson AN, Blood E, Hanscom B, Herkowitz H, Cammisa F, Albert T, Boden SD, Hilibrand A, Goldberg H, Berven S, An H; SPORT Investigators.
    N Engl J Med. 2008
    2008 Feb 21
    358(8):794-810. doi: 10.1056/NEJMoa0707136.
  71. Relationship between disc injury and manual lifting: a poroelastic finite element model study
    Natarajan RN, Williams JR, Lavender SA, An HS, Anderson GB
    Proc Inst Mech Eng H
    2008 Feb
    222(2):195-207
  72. Spine patient outcomes research trial: radiographic predictors of clinical outcomes after operative or nonoperative treatment of degenerative spondylolisthesis.
    Pearson AM, Lurie JD, Blood EA, Frymoyer JW, Braeutigam H, An H, Girardi FP, Weinstein JN.
    Spine (Phila Pa 1976). 2008
    2008 Dec 1
    33(25):2759-66. doi: 10.1097/BRS.0b013e31818e2d8b.
  73. Biological impact of the fibroblast growth factor family on articular cartilage and intervertebral disc homeostasis.
    Ellman MB, An HS, Muddasani P, Im HJ.
    Gene. 2008
    2008 Aug 15
    420(1):82-9. doi: 10.1016/j.gene.2008.04.019. Epub 2008 May 9. Review.
  74. New options in spine surgery--judgment is as important as ever.
    An HS.
    Am J Orthop (Belle Mead NJ). 2008
    2008 Aug
    37(8):397-8. No abstract available.
  75. Cell therapy using articular chondrocytes overexpressing BMP-7 or BMP-10 in a rabbit disc organ culture model.
    Zhang Y, Phillips FM, Thonar EJ, Oegema T, An HS, Roman-Blas JA, He TC, Anderson DG.
    Spine (Phila Pa 1976). 2008
    2008 Apr 15
    33(8):831-8. doi: 10.1097/BRS.0b013e31816b1f38.
  76. Action of fibroblast growth factor-2 on the intervertebral disc.
    Li X, An HS, Ellman M, Phillips F, Thonar EJ, Park DK, Udayakumar RK, Im HJ.
    Arthritis Res Ther. 2008
    2008
    10(2):R48. doi: 10.1186/ar2407. Epub 2008 Apr 24.
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