Malaysian Orthopaedic Journal最新文献

{"title":"Occupational Nerve Injuries due to Metallic Foreign Bodies: A Case Series of Eighteen Patients.","authors":"P Gupta, M Jindal, S Garg, K Garg","doi":"10.5704/MOJ.2403.011","DOIUrl":"https://doi.org/10.5704/MOJ.2403.011","url":null,"abstract":"<p><strong>Introduction: </strong>Peripheral nerve injuries (PNIs) remain an important health problem. PNIs mostly affect young men as this age group is mostly involved in road traffic accidents and other injuries at workplace. PNI can occur from foreign bodies like metal chips while working in industries using lathe machines. Among PNI's, injuries to the ulnar nerve, the brachial plexus and the median nerve are the most frequent lesions encountered.</p><p><strong>Materials and methods: </strong>This presentation is on a series of 18 cases of nerve injuries among industrial workers located from finger level up to the arm excluding the brachial plexus due to metallic foreign bodies entering while operating lathe machines over a period of two years with patients being followed-up over a one year period.</p><p><strong>Results: </strong>Mean age in this series was 31.3 years with age range 16-40 years and all were males. Two patients had more than one nerve involvement and one patient had associated vascular injury. All the patients showed functional improvement. Most common nerve injured was median nerve. Most common site for nerve injury was forearm. Combined lesions most commonly involved the ulnar and median nerves.</p><p><strong>Conclusion: </strong>Social cost of traumatic peripheral nerve injuries is significant since it has a higher incidence in young, previously healthy, and economically active people.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023338/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140858627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pre-operative Assessment of Shoulder Pathologies on MRI by a Radiologist and an Orthopaedic Surgeon.","authors":"S Winkler, B Herbst, K Kafchitsas, P Wohlmuth, P Hoffstetter, M J Rueth","doi":"10.5704/MOJ.2403.006","DOIUrl":"https://doi.org/10.5704/MOJ.2403.006","url":null,"abstract":"<p><strong>Introduction: </strong>Pathologies of the shoulder, i.e. rotator cuff tears and labral injuries are very common. Most patients receive MRI examination prior to surgery. A correct assessment of pathologies is significant for a detailed patient education and planning of surgery.</p><p><strong>Materials and methods: </strong>Sixty-nine patients were identified, who underwent both, a standardised shoulder MRI and following arthroscopic shoulder surgery in our hospital. For this retrospective comparative study, the MRIs were pseudonymised and evaluated separately by an orthopaedic surgeon and a radiologist. A third rater evaluated images and reports of shoulder surgery, which served as positive control. Results of all raters were then compared. The aim was an analysis of agreement rates of diagnostic accuracy of preoperative MRI by a radiologist and an orthopaedic surgeon.</p><p><strong>Results: </strong>The overall agreement with positive control of detecting transmural cuff tears was high (84% and 89%) and lower for partial tears (70-80%). Subscapularis tears were assessed with moderate rates of agreement (60 - 70%) compared to intra-operative findings. Labral pathologies were detected mostly correctly. SLAP lesions and pulley lesions of the LHB were identified with only moderate agreement (66.4% and 57.2%) and had a high inter-rater disagreement.</p><p><strong>Conclusion: </strong>This study demonstrated that tears of the rotator cuff (supraspinatus, infraspinatus) and labral pathologies can be assessed in non-contrast pre-operative shoulder MRI images with a high accuracy. This allows a detailed planning of surgery and aftercare. Pathologies of the subscapularis tendon, SLAP lesions and biceps instabilities are more challenging to detect correctly. There were only small differences between a radiologic and orthopaedic interpretation of the images.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023335/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140869635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shoulder and Neck Balance in Adolescent Idiopathic Scoliosis: Which Radiographic Indices are Reliable and Practical?","authors":"Qdn Vo, Hhh Nguyen, H T Nguyen, B N Pham, T K Truong","doi":"10.5704/MOJ.2403.007","DOIUrl":"https://doi.org/10.5704/MOJ.2403.007","url":null,"abstract":"<p><strong>Introduction: </strong>Deformities of the spine and thorax in adolescent idiopathic scoliosis affect appearance. They are a cause of inferiority, affecting psychological well-being and the social life of the patients. To contribute to curve evaluation, planning in curve correction, and improving the post-operative aesthetics, many studies on the correlation between appearance and radiography in the assessment of shoulder and neck balance have been reported recently. In general, these studies did not clarify which indices are required to evaluate shoulder and neck balance. This study aimed to learn about indices to assess shoulder and neck balance in adolescent idiopathic scoliosis in correlation between clinical appearance and radiography.</p><p><strong>Materials and methods: </strong>This observational study recruited 50 patients with adolescent idiopathic scoliosis who were 12 to 18 years of age with Cobb angle >10°. Based on Pearson correlation coefficient, radiographic parameters such as coracoid height difference (CHD), clavicle rib intersection distance (CRID), clavicle angle (CA), clavicle chest cage angle difference (CCAD), and T1 tilt angle were evaluated in correlation with clinical shoulder and neck balance by difference of inner shoulder height (SHi), difference of outer shoulder height (SHo), and neck tilt angle.</p><p><strong>Results: </strong>SHi was moderately correlated with T1 tilt angle (r [hereafter] = 0.45), CA (0.47), and CHD (0.57), high-moderately correlated with CRID (0.64), very-highly correlated with CCAD (0.84). SHo was moderately correlated with T1 tilt angle (0.43), highly correlated with CHD (0.60), CA (0.63), and CRID (0.72), and very-highly correlated with CCAD (0.89). T1 tilt angle was high-moderately correlated with neck tilt angle (0.76). The correlation coefficients between clinical and radiographic shoulder and neck balance according to sex, BMI, type of main curve, severity of main curve did not change significantly.</p><p><strong>Conclusion: </strong>There was a very high correlation between SHo (shoulder tilt) and CCAD (0.89); the correlation between SHo and CRID was high-moderate (0.72), but CRID is easier than CCAD to evaluate on radiographs. On the other hand, T1 tilt angle, which is the easiest radiographic parameter to evaluate, had a high-moderate correlation with neck tilt angle (0.76) but a moderate correlation with SHo (0.43).</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023348/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140868439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Incidence and Variation of Corona Mortis in Multiracial Asian: An Insight from 82 Cadavers.","authors":"N A Khirul-Ashar, I I Ismail, P Hussin, N M Nizlan, M H Harun, M Mawardi, R Lingam","doi":"10.5704/MOJ.2403.004","DOIUrl":"https://doi.org/10.5704/MOJ.2403.004","url":null,"abstract":"<p><strong>Introduction: </strong>Corona Mortis (CMOR) is a term used to describe an anatomical vascular variant of retropubic anastomosis located posterior to superior pubic ramus. We aim to provide sufficient data on the incidence, morphology and mean location of 'crown of death' in Asian population. Other objectives include to assess the relationship between CMOR incidence with gender, race and age.</p><p><strong>Materials and methods: </strong>This is a cross-sectional cadaveric study involving 164 randomly selected fresh multiracial Asian hemipelves (82 cadavers). Hemipelves were dissected to expose and evaluate the vascular elements posterior to superior pubic rami. Data were analysed using Chi-Square, t-test and with the help of IBM SPSS Statistics v26 software.</p><p><strong>Results: </strong>CMOR was found in 117 hemipelves (71.3%). No new morphological subtype was found. The mean distance of CMOR to symphysis pubis was 54.72mm (SD 9.35). Based on the results, it is evident that precaution needed to be taken at least within 55mm from symphysis pubis during any surgical intervention. The lack of statistically significant correlation between CMOR occurrence and gender, race and age suggest that the incidence of CMOR could be sporadic in manner.</p><p><strong>Conclusion: </strong>We conclude that CMOR is not just aberrant vessel as the incidence is high and this finding is comparable to other studies. The mean location of CMOR obtained in this study will guide surgeons from various disciplines in Asia to manage traumatic vascular injury and to perform a safe surgical procedure involving the pelvis area.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023341/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140866867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors Correlated with the Quality of Life after Total Knee Arthroplasties: A Literature Review.","authors":"A Sunadi, I Krisnana, N D Kurniawati","doi":"10.5704/MOJ.2403.001","DOIUrl":"https://doi.org/10.5704/MOJ.2403.001","url":null,"abstract":"<p><strong>Introduction: </strong>Total Knee Arthroplasty (TKA) has been widely reported to improve outcomes and quality of life (QoL) in patients with knee osteoarthritis (KOA), but there are still 15 - 20% of patients still experience pain, physical limitations, and other complications after TKA. Therefore, it is necessary to identify various factors that correlate with QoL from current evidence. The objective is to review the literature on factors that correlate with QoL in patients who underwent TKA.</p><p><strong>Materials and methods: </strong>A literature search was conducted on five databases, i.e. ProQuest, CINAHL, Medline, Embase, and Scopus, using the following keywords: total knee arthroplasty (TKA), post-operative, quality of life (QoL), and outcome. There were no restrictions on the research design.</p><p><strong>Results: </strong>This review found 14 articles (7 prospective studies and 7 retrospective studies) involving 15,972 patients who underwent TKA, with an age range of 32 - 94 years. All articles reported improvement in QoL after TKA. The review revealed 30 factors, of which 15 factors were significantly correlated with QoL after TKA. The factors were grouped into four types: demographic, socioeconomic, clinical, and psychosocial factors.</p><p><strong>Conclusion: </strong>Information regarding factors that correlate with QoL after TKA can be used for directing treatment and discharge planning according to the patient's factors.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023346/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140852253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of Diameter of Quadrupled Hamstring Graft for ACL Reconstruction using Pre-operative MRI Measurement as a Predictive Tool.","authors":"R S Kuruvilla, C Gunasekaran, T S Jepegnanam, M Kandagaddala, J Panwar","doi":"10.5704/MOJ.2403.012","DOIUrl":"https://doi.org/10.5704/MOJ.2403.012","url":null,"abstract":"<p><strong>Introduction: </strong>The diameter of the quadrupled Hamstring graft plays a significant role in the incidence of graft failures for ACL reconstruction. The ability to predict the graft size pre-operatively can prepare the surgeon for alternatives in the event of an inadequate graft diameter.</p><p><strong>Materials and methods: </strong>We retrospectively measured the diameter of the Semitendinosus tendon (ST) on the MRI in all patients who underwent arthroscopic ACL reconstruction using quadrupled Semitendinosus as their graft. We also estimated any correlation between various anthropometric data with pre-operative MRI based Cross Sectional Area (CSA) of the Hamstring tendon and final graft diameter in the South Asian population. The patients were included from Jan 2018 - Dec 2020.</p><p><strong>Results: </strong>The minimum CSA of ST to predict an eventual graft diameter of 7.5mm was 10.7mm2. The MRI based cross-sectional area measurement showed moderate correlation with the intra-operative graft diameter obtained. (r=0.62, p<0.001). The intra-class correlation coefficient between the radiologist and the surgeon was 0.82, 95% CI (0.57, 0.92) and a p-value <0.001.</p><p><strong>Conclusion: </strong>Pre-operative MRI can be a useful tool to predict the graft diameter. This coupled with the anthropometric data of the patient can be used as an adjunct to estimate the probable graft diameter. Thus, the surgeon can be better prepared for the surgery and can seek alternate graft options if the graft size is deemed inadequate pre-operatively.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023349/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140852831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clubfoot Deformity Treatment with Ilizarov Apparatus in the Paediatric Population without Corrective Osteotomies and Soft Tissue Release: A Cross-Sectional Study.","authors":"H S Aslani, M B Athari, R Tavakoli-Darestani, A Pourmojarab, M Baroutkoub, M Zamani","doi":"10.5704/MOJ.2311.007","DOIUrl":"https://doi.org/10.5704/MOJ.2311.007","url":null,"abstract":"<p><strong>Introduction: </strong>Neglected Club Foot deformity is not an uncommon limb anomaly encountered by orthopaedic surgeons. Many treatment methods have been proposed. Ilizarov apparatus is one of the techniques used to correct this deformity.</p><p><strong>Materials and methods: </strong>In this cross-sectional study 47 patients (56 feet) between the ages of 5 and 10 years with clubfoot deformity were treated using the Ilizarov external fixator. Age, sex, type of deformity, and radiographic parameters were measured on foot radiographs. Also, the American Orthopaedic Foot and Ankle Society (AOFAS) score and the Dimeglio classification were recorded for each patient before and after treatment.</p><p><strong>Results: </strong>The treatment was unilateral in 38 patients and bilateral in 9 patients. 39 patients (69.6%) were male, and 17 patients (30.4%) were female with a mean age of 7.86 ± 1.4 years. Plantar angles of ankle flexion and ankle flexion curve increased from 20.12±6.52 and -16.51±8.36 to 25.89±6.44 and 6.19±6.42, respectively. There was also an improvement in the talocalcaneal and tibiocalcaneal angles. Also, the angle between the first metatarsus and the talus in the front and side views improved (P<0.00). Additionally, the mean AOFAS score and Dimeglio classification significantly improved. Three cases were complicated with distal tibial physeal separation that were treated with additional open surgeries.</p><p><strong>Conclusion: </strong>Ilizarov technique without osteotomies and soft tissue release could be considered a less invasive and successful method of treatment for neglected clubfoot deformity in patient five to ten years old that are not good candidate for Ponseti method.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10723000/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138811810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surgical Treatments for Femoral Shaft Fractures: A Narrative Review.","authors":"B S Fu, Z H Zheng","doi":"10.5704/MOJ.2311.002","DOIUrl":"https://doi.org/10.5704/MOJ.2311.002","url":null,"abstract":"<p><p>Femoral shaft fractures are increasingly common due to various traumatic injuries. Intramedullary nail (IMN) is considered the gold standard treatment for these fractures, but comorbidities often require thorough trauma life support and intensive care. The primary goal of treatment is rigid fixation, early mobilisation, and long-term functional recovery. This article reviews current concepts in the treatment of femoral shaft fractures, including the effects of early or delayed operation, differences between antegrade or retrograde intramedullary nailing, alternative methods to using a fracture table, methods to predict nail length before operation, assessing femoral rotation during an operation, and complications.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10723005/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138811821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artificial Intelligence: Impact and Challenges to Authors, Journals and Medical Publishing.","authors":"Wcg Peh, A Saw","doi":"10.5704/MOJ.2311.001","DOIUrl":"https://doi.org/10.5704/MOJ.2311.001","url":null,"abstract":"<p><p>Artificial intelligence (AI)-assisted technologies are here to stay and cannot be ignored. These tools are able to generate highly-realistic human-like text and perform a wide range of useful language tasks with a wide range of applications. They have the potential to expedite innovation in health care and can aid in promoting equity and diversity in research by overcoming language barriers. When using these AI tools, authors must take responsibility for the output and originality of their work, as publishers expect all content to be generated by human authors unless there is a declaration to the contrary. Authors must disclose how AI tools have been used, and ensure appropriate attribution of all the text, images, and audio-visual material. The responsible use of AI language models and transparent reporting of how these tools were used in the creation of information and publication are vital to promote and protect the credibility and integrity of medical research, and trust in medical knowledge. Educating postgraduate and undergraduate students, researchers and authors on the applications and best usage of AI-assisted technologies, together with the importance of critical thinking, integrity and strict adherence to ethical principles, are key steps that need to be undertaken.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10723007/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138811808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexor Hallucis Longus Transfer And V-Y Plasty: An Effective Treatment Modality for Chronic Achilles Rupture - A Case Series.","authors":"R H Rashid, R Ali, M Zahid, M Ali, T Ahmad","doi":"10.5704/MOJ.2311.009","DOIUrl":"https://doi.org/10.5704/MOJ.2311.009","url":null,"abstract":"<p><strong>Introduction: </strong>To assess outcomes of FHL transfer and V-Y plasty for chronic Achilles rupture due to insertional Achilles tendinopathy.</p><p><strong>Materials and methods: </strong>A case series of 12 patients was conducted between 1st January 2017 and 31st December 2018. The patients had short flexor hallucis longus tendon transfer with gastrocnemius lengthening by V-Y plasty for Achilles tendon rupture. Patients were allowed full weight bearing at six weeks post-operatively, and were followed up at three months and six months post-operatively, when the range of motion of the ankle was examined, and the outcome was assessed using the EFAS score.</p><p><strong>Results: </strong>Of the 12 patients in the study, the majority were males; the mean age was 50.6±8.96 years. A significant improvement in dorsiflexion and plantarflexion was noted at the six-month follow-up compared to the three-month follow-up (P=<0.001 for both). When compared to the normal side, dorsiflexion and plantarflexion of the affected ankle were significantly less at three months but were comparable at six months post-operatively. A significant improvement was noted in the mean EFAS score at the six-month follow-up (25.5±5.71) compared to three months (18.6±0.90) post-surgery (P=0.001). Males were also noted to have significantly higher EFAS scores at their six-month follow-up than females (P=0.022). In contrast, a negative correlation was noted between the European Foot and Ankle Society (EFAS) score at the final follow-up and age (P=0.011).</p><p><strong>Conclusion: </strong>FHL tendon transfer with V-Y plasty in chronic Achilles rupture due to insertional Achilles tendinopathy is an effective procedure resulting in the restoration of the ankle range of motion and improvement in functional scores.</p>","PeriodicalId":45241,"journal":{"name":"Malaysian Orthopaedic Journal","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722995/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138811814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}