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Efficacy of a machine learning-based approach in predicting neurological prognosis of cervical spinal cord injury patients following urgent surgery within 24 h after injury. J Clin Neurosci 2023; 107:150-156. [PMID: 36376152 DOI: 10.1016/j.jocn.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 10/12/2022] [Accepted: 11/05/2022] [Indexed: 11/13/2022]
Abstract
We aimed to develop a machine learning (ML) model for predicting the neurological outcomes of cervical spinal cord injury (CSCI). We retrospectively analyzed 135 patients with CSCI who underwent surgery within 24 h after injury. Patients were assessed with the American Spinal Injury Association Impairment Scale (AIS; grades A to E) 6 months after injury. A total of 34 features extracted from demographic variables, surgical factors, laboratory variables, neurological status, and radiological findings were analyzed. The ML model was created using Light GBM, XGBoost, and CatBoost. We evaluated Shapley Additive Explanations (SHAP) values to determine the variables that contributed most to the prediction models. We constructed multiclass prediction models for the five AIS grades and binary classification models to predict more than one-grade improvement in AIS 6 months after injury. Of the ML models used, CatBoost showed the highest accuracy (0.800) for the prediction of AIS grade and the highest AUC (0.90) for predicting improvement in AIS. AIS grade at admission, intramedullary hemorrhage, longitudinal extent of intramedullary T2 hyperintensity, and HbA1c were identified as important features for these prediction models. The ML models successfully predicted neurological outcomes 6 months after injury following urgent surgery in patients with CSCI.
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Asukai M, Ushirozako H, Suda K, Matsumoto Harmon S, Komatsu M, Minami A, Takahata M, Iwasaki N, Matsuyama Y. Safety of early posterior fusion surgery without endovascular embolization for asymptomatic vertebral artery occlusion associated with cervical spine trauma. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2022; 31:3392-3401. [PMID: 35821446 DOI: 10.1007/s00586-022-07302-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/24/2022] [Accepted: 06/23/2022] [Indexed: 12/14/2022]
Abstract
PURPOSE Vertebral artery occlusion (VAO) is an increasingly recognized complication of cervical spine trauma. However, the management strategy of VAO remains heavily debated. Therefore, the aim of this retrospective study was to investigate the safety of early fusion surgery for traumatic VAO. METHODS This study included a total of 241 patients (average age 64.7 years; 201 men) who underwent early surgical treatment for acute cervical spine injury between 2012 and 2019. The incidence of VAO, cerebral infarction rates, the recanalization rates, and cerebral thromboembolism after recanalization were retrospectively analyzed. RESULTS VAO occurred in 22 patients (9.1%). Of the 22 patients with VAO, radiographic cerebral infarction was detected in 4 patients (21.1%) at initial evaluation, including 1 symptomatic medullar infarction (4.5%) and 3 asymptomatic cerebrum infarctions. A patient who experienced right medullar infarction showed no progression of the neurologic damage. Follow-up imaging revealed that the VAOs of 9 patients (40.9%) were recanalized, and the recanalization did not correlate with clinical adverse outcomes. The arteries of the remaining 13 (59.1%) patients remained occluded and clinically silent until the final follow-up (mean final follow-up 33.0 months). CONCLUSION Despite the lack of a concurrent control group with preoperative antiplatelet therapy or endovascular embolization for VAO, our results showed low symptomatic stroke rate (4.5%), high recanalization rate (40.9%), and low mortality rate (0%). Therefore, we believe that the indication for early stabilization surgery as management strategy of asymptomatic VAO might be one of the safe and effective treatment options for prevention of symptomatic cerebral infarction.
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Affiliation(s)
- Mitsuru Asukai
- Department of Orthopaedic Surgery, Hokkaido Spinal Cord Injury Center, 3-1 Higashi-4 Minami-1, Bibai, Hokkaido, 072-0015, Japan.
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan.
| | - Hiroki Ushirozako
- Department of Orthopaedic Surgery, Hokkaido Spinal Cord Injury Center, 3-1 Higashi-4 Minami-1, Bibai, Hokkaido, 072-0015, Japan
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Kota Suda
- Department of Orthopaedic Surgery, Hokkaido Spinal Cord Injury Center, 3-1 Higashi-4 Minami-1, Bibai, Hokkaido, 072-0015, Japan
| | - Satoko Matsumoto Harmon
- Department of Orthopaedic Surgery, Hokkaido Spinal Cord Injury Center, 3-1 Higashi-4 Minami-1, Bibai, Hokkaido, 072-0015, Japan
| | - Miki Komatsu
- Department of Orthopaedic Surgery, Hokkaido Spinal Cord Injury Center, 3-1 Higashi-4 Minami-1, Bibai, Hokkaido, 072-0015, Japan
| | - Akio Minami
- Department of Orthopaedic Surgery, Hokkaido Spinal Cord Injury Center, 3-1 Higashi-4 Minami-1, Bibai, Hokkaido, 072-0015, Japan
| | - Masahiko Takahata
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
| | - Yukihiro Matsuyama
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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Lee D, Kawano K, Ishida S, Yamaguchi Y, Kuroki T, Nagai T, Higa K, Kurogi S, Hamanaka H, Ochiai H, Chosa E. The impact of helicopter emergency medical services and craniocervical traction on the early reduction of cervical spine dislocation in a rural area of Japan. J Orthop Sci 2022; 27:606-613. [PMID: 33933327 DOI: 10.1016/j.jos.2021.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/29/2021] [Accepted: 03/15/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Several studies have shown an association between achieving decompression of the spinal cord within a few hours and neurological recovery, even in patients with complete paralysis due to cervical spine dislocation. This study aimed to clarify the impact of helicopter emergency medical services (HEMSs) and craniocervical traction on the rapid reduction of lower cervical spine dislocation in rural Japan. METHODS The success rate of and factors inhibiting closed reduction, the time from injury to reduction and the functional prognosis of lower cervical spine dislocations treated between July 2012 and February 2020 were retrospectively analysed. RESULTS Fourteen patients were transported by HEMS (group H), seven by ambulance (group A) and two by themselves. Although the average traveled distance and injury severity score were significantly higher in group H (64.5 km, 28.0) than in group A (24.7 km, 18.6), there was no significant difference in the average time to admission or the time to initiation of craniocervical traction after admission between groups H (159.4 min, 52.2 min) and A (163.6 min, 53.2 min). The success rate of closed reduction was 95%, and neurological deterioration was not observed in any cases. The average traction time and weight for reduction were 30.3 min and 16.3 kg, respectively. Body size and fracture-dislocation type did not significantly affect the traction time or weight. The rate of reduction within 4 h after injury was higher in group H (79%) than in group A (33%). Inner fixations were treated an average of 5.7 days after admission. After treatment, three of nine AIS A patients recovered the ability to walk, and all three patients underwent successful closed reduction within 4 h after injury. CONCLUSION HEMS and highly successful closed reduction contributed to the early reduction of cervical spine dislocation and can potentially improve complete paralysis.
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Affiliation(s)
- Deokcheol Lee
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan; Emergency Medicine, Acute Critical Care Center, University of Miyazaki Hospital, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan.
| | - Keisuke Kawano
- The Department of Orthopaedic Surgery, Miyazaki Prefectural Nobeoka Hospital, 2-1-10 Shinkouji, Nobeoka, 882-0835, Japan
| | - Shotaro Ishida
- The Department of Orthopaedic Surgery, Miyazaki Prefectural Nichinan Hospital, 1-9-5 Kiyama, Nichinan, 887-0013, Japan
| | - Yoichiro Yamaguchi
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan; Emergency Medicine, Acute Critical Care Center, University of Miyazaki Hospital, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Tomofumi Kuroki
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Takuya Nagai
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Kiyoshi Higa
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Syuji Kurogi
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Hideaki Hamanaka
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Hidenobu Ochiai
- Emergency Medicine, Acute Critical Care Center, University of Miyazaki Hospital, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Etsuo Chosa
- The Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
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Wu Y, Shao X, Wang X, Zeng J. An Experimental Study on the Safety and Mechanism of Reduction of Subaxial Cervical Facet Dislocation Using Z-Shape Elevating-Pulling Reduction Technique. World Neurosurg 2020; 142:e364-e371. [PMID: 32673803 DOI: 10.1016/j.wneu.2020.06.234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 06/27/2020] [Accepted: 06/30/2020] [Indexed: 02/05/2023]
Abstract
OBJECTIVE We sought to clarify the safety and unlocking mechanism of the Z-shape elevating-pulling closed reduction (ZR) technique and to analyze the differences in facet contact force and intraspinal pressure during subaxial facet dislocation reduction using the ZR technique and traditional skull traction closed reduction (SR). METHODS In 15 human cadaveric skull-neck-thorax specimens, reproducible unilateral and bilateral facet dislocations (UFDs/BFDs) were created at the C5-C6 level and then reduced by applying the ZR and SR techniques, respectively. Tekscan FlexiForce A-201 pressure sensors were used to measure the anterior and posterior intraspinal pressure and injured facet contact force under physiological conditions and before and after reduction. The maximum pressures during the reduction process were recorded. RESULTS After creation of the facet dislocation, the anterior and posterior intraspinal pressure and facet contact force were significantly increased relative to normal (P < 0.001). The UFDs and BFDs of all specimens were successfully reduced by both ZR and SR, and the intraspinal pressure and facet contact force were significantly reduced compared with before reduction (P < 0.001). Compared with SR, the maximum posterior intraspinal pressure during BFD reduction (P = 0.027) and the maximum facet contact force during UFD reduction (P < 0.001) were lower when ZR was used for closed reduction. CONCLUSIONS Our findings suggest that ZR and SR can both be used to reduce subaxial facet dislocation and decompress the spinal cord. However, the ZR technique appears to safer and more effective than the SR technique for closed reduction of subaxial facet dislocations.
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Affiliation(s)
- Ye Wu
- Department of Spine Surgery, Second Affiliated Hospital, Shantou University Medical College, Shantou, People's Republic of China
| | - Xinwei Shao
- Department of Spine Surgery, Second Affiliated Hospital, Shantou University Medical College, Shantou, People's Republic of China
| | - Xinjia Wang
- Department of Spine Surgery, Second Affiliated Hospital, Shantou University Medical College, Shantou, People's Republic of China.
| | - Jican Zeng
- Department of Spine Surgery, Second Affiliated Hospital, Shantou University Medical College, Shantou, People's Republic of China
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Wang X, An W, Wu Q, Wu S, Li G, Zeng J, Chen Y, Yao G. Multicentre comparative study of Z-shape elevating-pulling reduction and skull traction reduction for treatment of lower cervical locked facets. INTERNATIONAL ORTHOPAEDICS 2019; 43:1255-1262. [PMID: 29987557 DOI: 10.1007/s00264-018-4041-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 06/14/2018] [Indexed: 02/05/2023]
Abstract
PURPOSE The aim of this study was to assess the clinical efficacy and safety of Z-shape elevating-pulling reduction as compared to that of conventional skull traction in the treatment of lower cervical locked facet. METHODS Patients with cervical locked facet (n = 63) were retrospectively enrolled from four medical centers and divided into two groups according to the pre-operative reduction method used: Z-shape elevating-pulling reduction (Z-shape elevating group; n = 20) or traditional skull traction reduction (skull traction group; n = 43). RESULTS The success rates, efficacy of reduction, and safety were compared between the two groups. The success rates were significantly better in the Z-shape elevating group than in the skull traction group: 87.5% (7/8) vs. 35.3% (6/17) for unilateral locked facet reduction (P = 0.03) and 100% (12/12) vs. 69.2% (18/26) for bilateral locked facet reduction (P = 0.04). There was no obvious change in American Spinal Injury Association (ASIA) grade after the reduction in either group. Combined surgery was necessary in 5% in the Z-shape elevating group vs. 27.9% in the skull traction group. Imaging showed that the segment angle and horizontal displacement were significantly improved after surgery in both groups, with no significant difference between the groups. Follow-up with radiography showed good recovery of the cervical spine sequence; all internal fixation sites were stable, with no loosening, prolapse, or breakage of internal fixators. CONCLUSIONS Halo vest-assisted Z-shape elevating-pulling reduction appears to be a simple, safe, and effective technique for pre-operative reduction of lower cervical locked facets.
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Affiliation(s)
- Xinjia Wang
- Department of Spine Surgery, the Second Affiliated Hospital, Shantou University Medical College, Shantou, 515041, Guangdong, People's Republic of China.
| | - Weibin An
- Department of Spine Surgery, the Second Affiliated Hospital, Shantou University Medical College, Shantou, 515041, Guangdong, People's Republic of China
| | - Qiang Wu
- Yuebei People's Hospital, Shaoguan, 512026, Guangdong, People's Republic of China
| | - Shanpeng Wu
- Quanzhou First Hospital, Fujian Medical University, Quanzhou, 362000, Fujian, People's Republic of China
| | - Guoxin Li
- Peking University Shenzhen Hospital, Shenzhen, 518036, Guangdong, People's Republic of China
| | - Jican Zeng
- Department of Spine Surgery, the Second Affiliated Hospital, Shantou University Medical College, Shantou, 515041, Guangdong, People's Republic of China
| | - Yuchun Chen
- Department of Spine Surgery, the Second Affiliated Hospital, Shantou University Medical College, Shantou, 515041, Guangdong, People's Republic of China
| | - Guanfeng Yao
- Department of Spine Surgery, the Second Affiliated Hospital, Shantou University Medical College, Shantou, 515041, Guangdong, People's Republic of China
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Khorasanizadeh M, Yousefifard M, Eskian M, Lu Y, Chalangari M, Harrop JS, Jazayeri SB, Seyedpour S, Khodaei B, Hosseini M, Rahimi-Movaghar V. Neurological recovery following traumatic spinal cord injury: a systematic review and meta-analysis. J Neurosurg Spine 2019; 30:683-699. [PMID: 30771786 DOI: 10.3171/2018.10.spine18802] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/11/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Predicting neurological recovery following traumatic spinal cord injury (TSCI) is a complex task considering the heterogeneous nature of injury and the inconsistency of individual studies. This study aims to summarize the current evidence on neurological recovery following TSCI by use of a meta-analytical approach, and to identify injury, treatment, and study variables with prognostic significance. METHODS A literature search in MEDLINE and EMBASE was performed, and studies reporting follow-up changes in American Spinal Injury Association (ASIA) Impairment Scale (AIS) or Frankel or ASIA motor score (AMS) scales were included in the meta-analysis. The proportion of patients with at least 1 grade of AIS/Frankel improvement, and point changes in AMS were calculated using random pooled effect analysis. The potential effect of severity, level and mechanism of injury, type of treatment, time and country of study, and follow-up duration were evaluated using meta-regression analysis. RESULTS A total of 114 studies were included, reporting AIS/Frankel changes in 19,913 patients and AMS changes in 6920 patients. Overall, the quality of evidence was poor. The AIS/Frankel conversion rate was 19.3% (95% CI 16.2-22.6) for patients with grade A, 73.8% (95% CI 69.0-78.4) for those with grade B, 87.3% (95% CI 77.9-94.8) for those with grade C, and 46.5% (95% CI 38.2-54.9) for those with grade D. Neurological recovery was significantly different between all grades of SCI severity in the following order: C > B > D > A. Level of injury was a significant predictor of recovery; recovery rates followed this pattern: lumbar > cervical and thoracolumbar > thoracic. Thoracic SCI and penetrating SCI were significantly more likely to result in complete injury. Penetrating TSCI had a significantly lower recovery rate compared to blunt injury (OR 0.76, 95% CI 0.62-0.92; p = 0.006). Recovery rate was positively correlated with longer follow-up duration (p = 0.001). Studies with follow-up durations of approximately 6 months or less reported significantly lower recovery rates for incomplete SCI compared to studies with long-term (3-5 years) follow-ups. CONCLUSIONS The authors' meta-analysis provides an overall quantitative description of neurological outcomes associated with TSCI. Moreover, they demonstrated how neurological recovery after TSCI is significantly dependent on injury factors (i.e., severity, level, and mechanism of injury), but is not associated with type of treatment or country of origin. Based on these results, a minimum follow-up of 12 months is recommended for TSCI studies that include patients with neurologically incomplete injury.
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Affiliation(s)
| | - Mahmoud Yousefifard
- 2Physiology Research Center and Department of Physiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahsa Eskian
- 1Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences
| | - Yi Lu
- 3Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Maryam Chalangari
- 1Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences
| | - James S Harrop
- 4Departments of Neurological and Orthopedic Surgery, Thomas Jefferson University, Philadelphia
- 5Neurosurgery, Delaware Valley Regional Spinal Cord Injury Center, Thomas Jefferson University, Philadelphia, Pennsylvania; and
| | | | - Simin Seyedpour
- 1Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences
| | - Behzad Khodaei
- 1Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences
| | - Mostafa Hosseini
- 6Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Miao DC, Wang F, Shen Y. Immediate reduction under general anesthesia and combined anterior and posterior fusion in the treatment of distraction-flexion injury in the lower cervical spine. J Orthop Surg Res 2018; 13:126. [PMID: 29843751 PMCID: PMC5975551 DOI: 10.1186/s13018-018-0842-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 05/21/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Distraction-flexion of the lower cervical spine is a severe traumatic lesion, frequently resulting in paralysis. The optimal surgical treatment is controversial. It has been a challenge for orthopedic surgeons to manage distraction-flexion injury in the lower cervical spine while avoiding the risk of iatrogenic damage. Thus, safer strategies need to be designed and adopted.This study aimed to evaluate the clinical efficacy of immediate reduction under general anesthesia and combined anterior and posterior fusion in the treatment of distraction-flexion injury in the lower cervical spine. METHODS Twenty-four subjects of traumatic lower cervical spinal distraction-flexion were retrospectively analyzed from January 2010 to December 2013. Traffic accident was the primary cause of injury, with patients presenting with dislocated segments in C4-5 (n = 8), C5-6 (n = 10), and C6-7 (n = 6). Sixteen patients had unilateral facet dislocation and eight had bilateral facet dislocation. Spinal injuries were classified according to the American Spinal Injury Association (ASIA) impairment scale (2000 edition amended), with four cases of grade A, four cases of grade B, ten cases of grade C, four cases of grade D, and two cases of grade E. On admission, all patients underwent immediate reduction under general anesthesia and combined anterior and posterior fusion. The mean follow-up time was 3.5 years. RESULTS All operations were completed successfully, with no major complications. Postoperative X-rays showed satisfactory height for the cervical intervertebral space and recovery of the vertebral sequence. Bone fusion was completed within 4 to 6 months after surgery. Surgery also significantly improved neurological function in all patients. CONCLUSION Immediate reduction under general anesthesia and combined anterior and posterior fusion can be used to successfully treat distraction-flexion injury in the lower cervical spine, obtaining completed decompression, safe spinal re-alignment, and excellent immediate postoperative stability.
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Affiliation(s)
- De-Chao Miao
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139 Ziqiang Road, Shijiazhuang, 050051, China
| | - Feng Wang
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139 Ziqiang Road, Shijiazhuang, 050051, China
| | - Yong Shen
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139 Ziqiang Road, Shijiazhuang, 050051, China.
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The Michel Benoist and Robert Mulholland yearly European Spine Journal Review: a survey of the "surgical and research" articles in the European Spine Journal, 2017. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2018; 27:28-39. [PMID: 29313092 DOI: 10.1007/s00586-017-5435-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 12/16/2017] [Indexed: 10/18/2022]
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