Foot & Ankle Orthopaedics最新文献

{"title":"Open vs Endoscopic Surgical Treatment for Haglund Deformity: A Systematic Review, Meta-analysis, and Meta-regression.","authors":"Alex Guedes, Enilton de Santana Ribeiro de Mattos, Eduardo Silva Reis Barreto, César Romero Antunes Júnior","doi":"10.1177/24730114261435962","DOIUrl":"https://doi.org/10.1177/24730114261435962","url":null,"abstract":"<p><strong>Background: </strong>Haglund deformity, characterized by a bony prominence at the posterosuperior aspect of the calcaneus, is a frequent cause of posterior heel pain and Achilles tendinopathy. When conservative treatment fails, surgical resection is indicated. This systematic review and meta-analysis aimed to compare clinical and functional outcomes of open and endoscopic surgery in adults with Haglund deformity.</p><p><strong>Methods: </strong>The review followed PRISMA guidelines, was registered in PROSPERO (CRD420251061639), and included randomized trials or observational cohort studies directly comparing both techniques. The primary outcome was postoperative ankle function (American Orthopaedic Foot & Ankle Society score or the Victorian Institute of Sports Assessment-Achilles questionnaire scores); secondary outcomes included operative time, postoperative pain (visual analog scale), and adverse events. Random effects (restricted maximum likelihood) meta-analyses were performed, and risk of bias was assessed using the ROBINS-I tool.</p><p><strong>Results: </strong>Five cohort studies, totaling 226 patients (127 endoscopic, 99 open), met the inclusion criteria. The meta-analysis showed no significant difference in postoperative ankle function between techniques (standardized mean difference = -0.19, 95% CI -0.72 to 0.35; <i>I</i>² = 66.7%). Operative time was shorter in the open surgery group (mean difference = -11.73 minutes, 95% CI -23.03 to -0.42; <i>I</i>² = 94.6%). No significant differences were observed in postoperative pain or adverse events. All studies had a serious overall risk of bias.</p><p><strong>Conclusion: </strong>The available comparative observational evidence does not demonstrate clear superiority of either technique for the evaluated outcomes. Interpretation of symptom and function outcomes is limited by the measurement properties of the instruments used in the source studies. These findings represent a conservative synthesis of the best comparative evidence currently available and highlight the need for adequately powered randomized clinical trials with standardized outcome measures to more reliably inform surgical decision making.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261435962"},"PeriodicalIF":0.0,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13145043/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147835895","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":"Optimizing Patient Positioning to Improve Orientation, Ergonomics, and Standardization in Percutaneous Forefoot Surgery: A Technical Tip.","authors":"Andreas Toepfer, Thomas L Lewis, Peter Lam, Primoz Potocnik","doi":"10.1177/24730114261436763","DOIUrl":"https://doi.org/10.1177/24730114261436763","url":null,"abstract":"<p><p>Graphical Abstract.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261436763"},"PeriodicalIF":0.0,"publicationDate":"2026-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13129298/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147813092","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":"Impact of Initial Immobilization Method on Outcomes in Unstable Weber B Ankle Fractures: A Retrospective Cohort Study.","authors":"Isabella Rubin, Gianna Guarino, Meghan Lauzé, Antonio Lobao, Abhay Patel","doi":"10.1177/24730114261438476","DOIUrl":"https://doi.org/10.1177/24730114261438476","url":null,"abstract":"<p><strong>Background: </strong>Weber B ankle fractures with medial clear space (MCS) widening on stress radiographs are unstable injuries that may require surgical stabilization. Initial emergency department management varies, with patients receiving a cast or splint after reduction, although concerns for soft tissue complications often limit cast use. It remains unclear whether splint or cast immobilization affects clinical or radiographic outcomes.</p><p><strong>Methods: </strong>We retrospectively reviewed 295 patients treated for closed Weber B ankle fractures between January 1, 2017, and February 15, 2025; among them, 96 were determined to have an unstable pattern based on MCS widening on stress radiographs. Inclusion criteria were age ≥18 years, isolated fibular fracture with MCS widening indicating deltoid incompetence, and ankle radiographs at initial, postreduction, and follow-up time points. Patients with bimalleolar or trimalleolar fractures were excluded. We compared MCS values, surgical rates, reduction attempts, and complications across initial immobilization types.</p><p><strong>Results: </strong>Postreduction MCS was significantly smaller in the cast group compared to the splint group (2.79 ± 0.50 vs 3.41 ± 0.83 mm, <i>P</i> < .01). MCS at follow-up remained lower in the cast group and below the 4-mm threshold commonly used to guide surgical decision making (2.73 ± 0.54 vs 4.14 ± 1.10 mm, <i>P</i> < .01). A greater proportion of casted patients maintained reduction at follow-up (n = 72 vs 19, <i>P</i> = .04), reinforcing the association between initial casting and radiographic stability. There were no statistically significant differences in surgical or complication rates between groups.</p><p><strong>Conclusion: </strong>Initial immobilization with a cast in unstable Weber B ankle fractures was associated with improved postreduction and follow-up radiographic alignment measured by MCS. The absence of increased complication rates among cast patients indicates that the superior radiographic stability with casting is not offset by increased complications, although the study may have been underpowered to detect a difference in safety profiles. Future prospective studies can inform the development of standardized immobilization protocols for unstable Weber B fractures.</p><p><strong>Level of evidence: </strong>Level III, retrospective comparative study.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261438476"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13129345/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147813079","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":"Ankle Arthrodesis Associated With Risk of Progression to Total Knee Arthroplasty Compared to Total Ankle Arthroplasty.","authors":"Gloria Coden, Colin Wood, Andrzej Brzezinski, Matthew Beckles, Shannon Gray, Riley Smith, Kurt Hofmann","doi":"10.1177/24730114261435963","DOIUrl":"https://doi.org/10.1177/24730114261435963","url":null,"abstract":"<p><strong>Background: </strong>It is unknown how the increased range of motion and improved gait mechanics provided by total ankle arthroplasty (TAA) affects the progression of knee arthritis compared with ankle arthrodesis (AA). We hypothesized that patients treated with TAA would have a lower incidence of postoperative knee arthritis and total knee arthroplasty (TKA) compared with AA.</p><p><strong>Methods: </strong>We retrospectively reviewed a matched cohort of 3751 AAs and 3751 TAAs performed between January 1, 2007, and December 31, 2021, using a commercial claims database. Patients with a history of preoperative knee arthritis or TKA were excluded. Patients were matched 1:1 for gender, age at time of ankle surgery, indication for ankle surgery, year of ankle surgery, and geographical region. Univariate and multivariate regression analyses were performed. Significance was set at <i>P</i> < .05.</p><p><strong>Results: </strong>Demographics were similar between AA and TAA. AA (absolute risk [AR] = 17.54%, odds ratio [OR] = 1.24, CI = 1.07-1.44), earlier years of ankle surgery, and older age increased the risk of postoperative knee arthritis compared with TAA (AR = 10.10%, absolute risk reduction [ARR] = 7.44%, CI = 5.89%-8.99%). Posttraumatic ankle arthritis, inpatient surgery, and surgery in the West region were protective against developing postoperative knee arthritis. AA (AR = 4.19%, OR = 2.37, CI = 1.65-3.39), earlier year of ankle surgery, males, and other indication for ankle surgery increased the risk of requiring a postoperative TKA compared with TAA (AR = 1.36%, ARR = 2.83%, CI = 2.09%-3.57%). Posttraumatic ankle arthritis and inpatient surgery were protective factors against requiring a TKA.</p><p><strong>Conclusion: </strong>There is a significantly higher incidence of patients who underwent TKA after AA compared with TAA, although the inability to confirm laterality in 38% of cases dilutes the hypothesis of a specific biomechanical association in the study. We recommend that surgeons carefully weigh the risks and benefits of TAA and AA with this in mind, especially in patients with minimal knee arthritis, as a potential strategy to mitigate risk of requiring TKA in the future.</p><p><strong>Level of evidence: </strong>Level III, retrospective comparative study.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261435963"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13129307/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147813024","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":"Comparison of Open Scarf-Akin Osteotomy and Minimally Invasive Chevron and Akin (MICA) Osteotomy for Severe Hallux Valgus Deformity: A Retrospective Study.","authors":"WaiLok Charlix Yeung, Ming Hong Chau, Ka Ki Stephanie Liu","doi":"10.1177/24730114261436758","DOIUrl":"https://doi.org/10.1177/24730114261436758","url":null,"abstract":"<p><strong>Background: </strong>Minimally invasive surgery (MIS) for hallux valgus, particularly the minimally invasive chevron and Akin (MICA) technique, is gaining popularity. However, comparative studies between open scarf-Akin osteotomy (SA) and MICA remain limited, particularly for severe cases (ie, hallux valgus angle [HVA] ≥ 40° or intermetatarsal angle [IMA] ≥ 16°). This study aimed to compare the clinical and radiographic outcomes between SA and MICA for severe hallux valgus.</p><p><strong>Methods: </strong>We retrospectively reviewed 56 consecutive feet (SA = 33; MICA = 23) treated between January 2019 and January 2023 at a single institution in Hong Kong. Clinical outcomes were evaluated using the American Orthopaedic Foot & Ankle Society (AOFAS) score, Self-Reported Foot and Ankle Score (SEFAS), and visual analog scale (VAS) for pain. Radiographic parameters included the HVA, IMA, distal metatarsal articular angle (DMAA), first metatarsal pronation, and first metatarsal length.</p><p><strong>Results: </strong>Baseline characteristics were broadly comparable, with deformity severity trending higher in MICA. MICA had shorter total operative time and hospital stay (<i>P</i> = .002 and <i>P</i> < .001), although the SA group had a higher frequency of concomitant lesser-toe procedures (85% vs 61%, <i>P</i> = .056), and MICA showed greater improvements in AOFAS and SEFAS (<i>P</i> = .006 and <i>P</i> = .032). In exploratory 2-predictor sensitivity regression adjusting for concomitant lesser-toe procedure, MICA remained associated with shorter operative time (beta = -40.0 min, 95% CI -66.3 to -13.7; <i>P</i> = .003) and shorter length of stay (beta = -2.35 days, 95% CI -3.52 to -1.17; <i>P</i> < .001). After this adjustment, AOFAS improvement was greater in MICA (beta = +6.40, <i>P</i> = .008), whereas SEFAS and VAS improvements were not statistically different. For pronation, SA achieved superior apparent correction: severe postoperative pronation (Wagner 3) was 0% after SA vs 48% after MICA, and baseline-adjusted ordered logistic regression similarly favored SA (MICA vs SA OR 3.75, 95% CI 1.08-13.03; <i>P</i> = .037).</p><p><strong>Conclusion: </strong>Both procedures reliably corrected severe HV deformity. MICA was associated with shorter total operative time and reduced length of stay. In exploratory covariate-adjusted sensitivity models, MICA maintained advantages in operative time and AOFAS scores, whereas between-group differences in SEFAS and angular radiographic outcomes were attenuated or nonsignificant. In contrast, SA demonstrated stronger correction of apparent first-metatarsal pronation, with no apparent residual severe pronation at follow-up compared with MICA.</p><p><strong>Level of evidence: </strong>Level III, retrospective cohort study.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261436758"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13129320/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147813110","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":"Response to: \"Letter Regarding: Modified Sliding Fibular Graft for Aneurysmal Bone Cyst of the Lateral Malleolus: Technique and Two-Case Series\".","authors":"Filipe Marques de Oliveira, Mariana Vendramin Mateussi, Jairo Greco Garcia, Marcelo de Toledo Petrilli, Dan Carai Maia Viola, Reynaldo Jesus-Garcia Filho","doi":"10.1177/24730114261435584","DOIUrl":"https://doi.org/10.1177/24730114261435584","url":null,"abstract":"","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261435584"},"PeriodicalIF":0.0,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13111814/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147767220","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":"Letter Regarding: Modified Sliding Fibular Graft for Aneurysmal Bone Cyst of the Lateral Malleolus: Technique and Two-Case Series.","authors":"Mahad Ahmad, Fnu Mehrish, Maheen Imran","doi":"10.1177/24730114261435585","DOIUrl":"https://doi.org/10.1177/24730114261435585","url":null,"abstract":"","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261435585"},"PeriodicalIF":0.0,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13111822/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147767246","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":"First Metatarsal Reconstruction After Resection for Musculoskeletal Tumors: A Technical Tip Using Vascularized Fibula.","authors":"Roberto Scanferla, Francesco Muratori, Laura Fratangelo, Luca Delcroix, Domenico Andrea Campanacci","doi":"10.1177/24730114261440468","DOIUrl":"https://doi.org/10.1177/24730114261440468","url":null,"abstract":"","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261440468"},"PeriodicalIF":0.0,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13111828/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147767103","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":"Early Full Weight-Bearing After Calcaneal Fracture Using a Heel-Unloader Orthosis: Equivalent Radiographic Outcomes Compared to Traditional Cast Treatment.","authors":"Verena Hecht, Fabian Krause, Helen Anwander","doi":"10.1177/24730114261434237","DOIUrl":"https://doi.org/10.1177/24730114261434237","url":null,"abstract":"<p><strong>Background: </strong>Standard treatment of calcaneal fractures involves prolonged immobilization with partial weight-bearing, risking ankle stiffness and lower-leg deconditioning. The heel-unloader enables early full weight-bearing by redirecting axial load from the hindfoot to the midfoot, forefoot, and lower leg. This study compares radiologic and clinical outcomes of heel-unloader vs conventional cast immobilisation.</p><p><strong>Methods: </strong>We retrospectively analyzed 101 calcaneal fractures treated with cast immobilization and partial weight-bearing or a heel-unloader with early full weight-bearing. Böhler angle (BA) loss, evaluating macroscopic fracture displacement and heel height, was the primary endpoint; secondary outcomes were pain, ankle/subtalar motion, complications, and radiologically subtalar degeneration. Equivalence in BA loss was tested by 2 one-sided tests (TOST).</p><p><strong>Results: </strong>Overall, 16.8% of the fractures were managed non-operatively and 83.2% operatively, with similar distributions between the groups (<i>P</i> = .397). After 4 weeks of non-weight-bearing, 59 (58.4%) fractures continued in a heel-unloader and 42 (41.6%) with a cast. Baseline and fracture characteristics were comparable. Mean BA loss at 12 weeks was -4.7° ± 5.3° (heel-unloader group) vs -3.8° ± 5.5° (cast group) (<i>P</i> = .44), confirming equivalence (TOST <i>P</i> < .001). Other outcomes showed no significant differences.</p><p><strong>Conclusion: </strong>Early full weight-bearing with a heel-unloader yields radiologically and clinically equivalent macroscopic results to traditional casting and is a safe alternative for early mobilization.</p><p><strong>Level of evidence: </strong>Level III, retrospective comparative study.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261434237"},"PeriodicalIF":0.0,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13110290/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147767075","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":"Revision Total Ankle Arthroplasty Using the INVISION Modular Implant System: A Systematic Review and Meta-Analysis.","authors":"Shahabeddin Yazdanpanah, Braeden R Gooch, Sashrik Sribhashyam, John W Cyrus, Benjamin P Cassidy, Samuel B Adams, Albert T Anastasio, Conor N O'Neill","doi":"10.1177/24730114261435959","DOIUrl":"https://doi.org/10.1177/24730114261435959","url":null,"abstract":"<p><strong>Background: </strong>Globally, rising rates of ankle arthritis have largely driven increases in total ankle arthroplasty (TAA) and revision TAA (rTAA). INVISION (Wright Medical/Stryker) is a novel modular implant system designed for addressing rTAA-associated challenges; however, clinical outcomes remain limited. Therefore, the purpose of this systematic review is to synthesize the available INVISION rTAA literature to evaluate implant survivorship and complication rates.</p><p><strong>Methods: </strong>A PROSPERO-preregistered query of PubMed/MEDLINE, Embase, Cochrane, CINAHL, and Web of Science was performed on August 18, 2025, to identify INVISION-using rTAA studies. Quality was assessed using the Methodological Index for Non-Randomized Studies (MINORS). Extractions included demographics and operative outcomes. Statistics included frequency-weighted means (FWMs) and meta-analyses.</p><p><strong>Results: </strong>Five retrospective studies were included (mean MINORS = 10.2 ± 0.8; n = 100; FWM age = 64.0 ± 8.4 years; follow-up = 2.8 ± 1.2 years; 56% male; body mass index = 30.5 ± 5.5 kg/m²; time-to-revision = 4.5 ± 2.5 years). Tibial-talar implant permutations were INVISION-INVISION (25%), INVISION-INBONEII (19%), and INBONEII-INVISION (56%). Patients underwent an average of 1.8 additional procedures to rTAA: frequently medial malleolus fixation (21.8%) and hardware removal (17.3%). Pooled implant survivorship was 88%. Complication rates varied (0%-39.3%), and the all-cause rTAA pooled reoperation rate was 21%, driven primarily by aseptic loosening (38.1%) and infection (28.6%). The pooled re-revision rate was 11%. Meta-analyses revealed no significant differences in either all-cause reoperation or re-revision risk when comparing INVISION-INVISION to any other implant permutations.</p><p><strong>Conclusion: </strong>INVISION rTAA demonstrated early survivorship and complication rates that should be interpreted cautiously given retrospective study designs, high heterogeneity, \"very low\" GRADE outcome certainty, and limited follow-up duration. Aseptic loosening and infection remain the predominant drivers of reoperation and re-revision. No significant differences in these risks were detected across implant permutations. Future longitudinal, comparative studies are needed.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"11 2","pages":"24730114261435959"},"PeriodicalIF":0.0,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13110334/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147767222","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}