Thomas Valerio , Elise Lupon , Alexandre Quemener-Tanguy , Eloïse Masse , Camille Brenac , Jean-Baptiste de Villeneuve Bargemon
{"title":"Morphometric and curvature CT-based study of the distal radius watershed line","authors":"Thomas Valerio , Elise Lupon , Alexandre Quemener-Tanguy , Eloïse Masse , Camille Brenac , Jean-Baptiste de Villeneuve Bargemon","doi":"10.1016/j.hansur.2025.102168","DOIUrl":"10.1016/j.hansur.2025.102168","url":null,"abstract":"<div><h3>Purpose</h3><div>Fixation of distal radius fractures involving the volar rim is technically demanding and often complex. In most cases, it requires the use of so-called “specific” plates. Although these plates have been developed using morphometric databases, proper application can still be imperfect—even when the plate appears to be correctly positioned. This mismatch may result in secondary displacement of the fragment, tendon irritation, or even tendon rupture. We hypothesized that anatomical variations in the radius, particularly in the shape of the watershed line, may explain the difficulty in achieving optimal plate adaptation in some patients.</div></div><div><h3>Methods</h3><div>Nineteen distal radius were analyzed using Computed Tomography-scan segmentation and curvature analysis to assess the shape of the watershed line. K-means clustering was then performed to identify distinct groups based on volar rim curvature patterns.</div></div><div><h3>Results</h3><div>Clustering analysis revealed two distinct anatomical groups based on volar rim curvature. The first group exhibited a mean curvature of 0.07 ± 0.03 mm<sup>−</sup>¹, while the second group had a significantly higher curvature of 0.23 ± 0.06 mm<sup>−</sup>¹ (mean ± SD). A Student’s <em>t</em>-test confirmed a statistically significant difference between the two groups (p < 0.001).</div></div><div><h3>Conclusions</h3><div>Our findings suggest the existence of at least two anatomical variations in volar rim shape at the watershed line, forming a spectrum between flatter and more sharply curved forms. These anatomical differences may explain inconsistencies in plate adaptation and should be taken into account by surgeons when selecting and positioning fixation hardware.</div></div><div><h3>Level of evidence</h3><div>Diagnostic study (IIIb).</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102168"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144096578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Peter V. Dinh , Timothy A. Reiad , Haneef A. Khan , Joseph A. Gil
{"title":"Twenty-Year National Trends in Finger Fracture Epidemiology: Declining Incidence, Demographic Disparities, and Digit-Specific Injury Patterns","authors":"Peter V. Dinh , Timothy A. Reiad , Haneef A. Khan , Joseph A. Gil","doi":"10.1016/j.hansur.2025.102205","DOIUrl":"10.1016/j.hansur.2025.102205","url":null,"abstract":"<div><h3>Background</h3><div>Finger fractures are among the most common upper extremity injuries, with significant functional and socioeconomic implications. While prior studies have described the general epidemiology of finger fractures, there is limited data on longitudinal trends, digit-specific patterns, and differences in injury mechanisms by demographic groups in the United States.</div></div><div><h3>Methods</h3><div>A retrospective analysis was performed using the National Electronic Injury Surveillance System (NEISS) database to estimate national trends in finger fracture incidence from 2004 to 2023. Cases were identified using specific diagnosis and body part codes, with narrative keyword filtering to determine the affected digit. Demographic variables, injury mechanisms, and annual incidence rates were analyzed. Trends were assessed using linear regression, and differences between groups were evaluated with Odds Ratios and Injury Proportion Ratios.</div></div><div><h3>Results</h3><div>A total of 109,317 finger fractures were reported over the twenty-year study period, representing a nationally estimated 3,693,924 finger fractures. The average annual incidence was 59.0 per 100,000 person-years. Males accounted for 65.4% of total cases, with a male-to-female incidence ratio of approximately 2:1. The thumb (26.42%) and little finger (26.15%) were the most frequently fractured digits, followed by the ring finger (15.29%), middle finger (14.53%), and index finger (12.06%). The most common causes were football (11.7%), basketball (11.5%), and doors (9.8%). There was a 46% decline in emergency department finger fracture rates from 2004 to 2023 (<em>p</em> < .01), driven primarily by reductions in the 0–18 and 19–40 age groups. Rates in adults over 40 remained stable.</div></div><div><h3>Conclusion</h3><div>This comprehensive, longitudinal analysis demonstrates a significant decline in emergency department finger fracture incidence in the United States over the past two decades, with notable demographic and mechanistic patterns. These findings highlight the importance of age- and activity-specific prevention strategies, continued surveillance, and targeted interventions to further reduce the burden of finger fractures, particularly among vulnerable populations such as older adults and children.</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102205"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144295543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ophélie Simon , Alexandre Petit , Émilie Marteau , Nicolas Bigorre
{"title":"QuickDASH: Reliability in the assessment of carpal tunnel syndrome","authors":"Ophélie Simon , Alexandre Petit , Émilie Marteau , Nicolas Bigorre","doi":"10.1016/j.hansur.2025.102202","DOIUrl":"10.1016/j.hansur.2025.102202","url":null,"abstract":"<div><h3>Objective</h3><div>The Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire, along with its shortened version QuickDASH, are widely used self-assessment tools for evaluating upper limb function across various acute and chronic conditions. These tools aim to standardise outcome measures globally, contingent upon certified versions and adherence to calculation guidelines. While overall reliability of the QuickDASH is established, question-by-question reproducibility and methodology have not been rigorously assessed. Carpal tunnel syndrome was chosen for testing the reliability of the QuickDASH.</div><div>This study aimed to evaluate the question-by-question reliability of the QuickDASH in carpal tunnel syndrome patients. Additionally, we surveyed members of the French Society of Hand Surgery regarding their QuickDASH usage practices and examined patients' functional expectations to correlate them with the questionnaire items. Our hypothesis suggested that response reliability might be affected by patient and practitioner factors or data collection methods.</div></div><div><h3>Materials and methods</h3><div>A non-interventional, single-center study was conducted from July 2023 to June 2024, including patients whose carpal tunnel syndrome was confirmed by clinical and electrophysiological tests. Patients completed the QuickDASH three times on consecutive days. Demographic, clinical, and paraclinical data were collected, including pain medication, ease of completion, age, sex, body mass index, profession, occupational health status, smoking, diabetes, thoracic outlet syndrome, and electroneuromyogram data. In October 2023, an online survey queried SFCM members on their QuickDASH application methods, response management, and knowledge of guidelines. Finally, A separate group of patients was interviewed preoperatively to describe their symptoms openly and symptoms were then compiled for analysis.</div></div><div><h3>Results</h3><div>The QuickDASH was found easy to complete by 93.3% of patients. The intraclass correlation scores indicated strong reliability for the overall QuickDASH, with 93% pre-operatively, 87% post-operatively and 92% in the overall population. However, question-specific intra-class correlations revealed less consistency, particularly for certain items post-operatively. Among surveyed practitioners, 65.5% reported that patients completed the QuickDASH autonomously, and 63.2% provided direct clarification when needed. While 58.1% of practitioners indicated the QuickDASH did not affect therapeutic decisions, 41.9% acknowledged its potential impact. Word clouds created from open-ended patient responses highlighted pain, tingling, and nocturnal symptoms as primary concerns pre-operatively.</div></div><div><h3>Conclusion</h3><div>The QuickDASH questionnaire demonstrated high reliability for measuring upper limb function in carpal tunnel syndrome patients, though some questions showed variability in their responses. Des","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102202"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144277054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Treatment of finger tendon sheath ganglion with extracorporeal shock wave therapy: A case report","authors":"Christina Lemhoefer, Dana Loudovici-Krug","doi":"10.1016/j.hansur.2025.102215","DOIUrl":"10.1016/j.hansur.2025.102215","url":null,"abstract":"<div><div>A ganglion cyst on the flexor tendon of the hand is a common clinical condition. However, there is no consensus on non-surgical treatment methods. Here, a case of the initial treatment of a ganglion using extracorporeal shockwave therapy is presented.</div></div><div><h3>Evidence level</h3><div>V.</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102215"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144610714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Domenico Marrella , Su Jiang , Kyros Ipaktchi , Philippe Liverneaux
{"title":"Comparing AI-generated and human peer reviews: A study on 11 articles","authors":"Domenico Marrella , Su Jiang , Kyros Ipaktchi , Philippe Liverneaux","doi":"10.1016/j.hansur.2025.102225","DOIUrl":"10.1016/j.hansur.2025.102225","url":null,"abstract":"<div><div>While the peer review process remains the gold standard for evaluating the quality of scientific articles, it is facing a crisis due to the increase in submissions and prolonged review times. This study assessed ChatGPT’s ability to formulate editorial decisions and produce peer reviews for surgery-related manuscripts. We tested the hypothesis that ChatGPT's peer review quality exceeds that of human reviewers.</div><div>Eleven published articles in the field of hand surgery, initially rejected by one journal and after accepted by another, were anonymized by removing the title page from the original PDF submission and subsequently evaluated by requesting ChatGPT 4o and o1 to determine each article’s eligibility for publication and generate a peer review. The policy prohibiting the submission of unpublished manuscripts to large language models was not violated, as all articles had already been published at the time of the study.</div><div>An experienced hand surgeon assessed all peer reviews (including the original human reviews from both the rejecting and the accepting journals and ChatGPT-generated) using the ARCADIA score, which consists of 20 items rated from 1 to 5 on a Likert scale.</div><div>The average acceptance rate of ChatGPT 4o was 95%, while that of ChatGPT o1 was 98%. The concordance of ChatGPT 4o's decisions with those of the journal with the highest impact factor was 32%, whereas that of ChatGPT o1 was 29%. ChatGPT 4o's decisions were in accordance with those of the journal with the lowest impact factor, which was 68%, while ChatGPT o1's was 71%. The ARCADIA scores of peer reviews generated by human reviewers (2.8 for journals that accepted the article and 3.2 for those that rejected it) were lower than those of ChatGPT 4o (4.8) and o1 (4.9).</div><div>In conclusion, ChatGPT can optimize the peer review process for scientific articles if it receives precise instructions to avoid \"hallucinations.\" Many of its functionalities surpass human capabilities, but managing its limitations rigorously is essential to improving publication quality.</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102225"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144683858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sinan Mert , Lindsay Muir , Benedikt Fuchs , Vanessa Lucksch , Felix H. Vollbach , Elisabeth M. Haas-Lützenberger , Riccardo E. Giunta , Nikolaus Thierfelder , Wolfram Demmer
{"title":"Can artificial intelligence pass the written European Board of Hand Surgery exam?","authors":"Sinan Mert , Lindsay Muir , Benedikt Fuchs , Vanessa Lucksch , Felix H. Vollbach , Elisabeth M. Haas-Lützenberger , Riccardo E. Giunta , Nikolaus Thierfelder , Wolfram Demmer","doi":"10.1016/j.hansur.2025.102197","DOIUrl":"10.1016/j.hansur.2025.102197","url":null,"abstract":"<div><div>Various artificial intelligence-based applications have emerged as transformative tools across numerous domains. Among these, ChatGPT has earned global recognition with its capacity for dynamic user interaction and holds significant potential in the medical sector. However, the subject-specific accuracy of ChatGPT remains a matter of debate.</div><div>This study assesses the capabilities and knowledge of different artificial intelligence chatbots (ChatGPT, Google Gemini, and Claude) in the domain of hand surgery. Each chatbot conducted a full written EBHS exam. The test results were analyzed according to the EBHS-guidelines, focused on the total scores and the ratio of correct to incorrect responses for each artificial intelligence model. Findings revealed that three out of the four chatbots achieved passing scores on the exam. Notably, ChatGPT-4o1 demonstrated significantly superior performance.</div><div>This study highlights the subject-specific expertise of different artificial intelligence programs within the specialized field of hand surgery while also underscoring their variability and limitations.</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102197"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144188719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Michelle A. Richardson , Adam Margalit , Madeline C. Rocks , Matthew V. Abola , Jadie De Tolla , Ali Azad
{"title":"Surgical outcomes in chronic perilunate dislocations: A systematic review","authors":"Michelle A. Richardson , Adam Margalit , Madeline C. Rocks , Matthew V. Abola , Jadie De Tolla , Ali Azad","doi":"10.1016/j.hansur.2025.102212","DOIUrl":"10.1016/j.hansur.2025.102212","url":null,"abstract":"<div><div>Perilunate dislocations and perilunate fracture-dislocations are marked by a wide range of high energy trauma to the wrist. Chronic perilunate injuries are defined by a treatment delay of at least 6 weeks. This systematic review aims to compare the various operative techniques and outcomes for chronic perilunate injuries. A systematic review of literature on chronic perilunate dislocations and perilunate fracture-dislocations were performed according to Preferred Reporting Items for Systematic Reviews and Meta-analysis statement guidelines using PubMed, Embase, Scopus, and Web of Science. A total of 326 articles were included, of which ultimately comprised of 13 articles with 158 patients. We demonstrate a rate of 59% perilunate fracture-dislocations, 30% perilunate dislocations, and 11% lunate dislocations. Mechanisms of injury were mostly high energy falls (31%) and motor vehicle accidents (50%). Fifty percent of patients had median nerve symptoms/paresthesias at time of initial presentation. Surgical technique included proximal row carpectomy (34%), open reduction internal fixation (49%), scaphoid excision with four corner fusion (7%), wrist arthrodesis (2%), partial lunate/scaphoid excision (1%), total lunate excision (5%), and isolated carpal tunnel release (1%). Average follow-up of time was 5 years. There was a 28% incidence of radiologic osteoarthritis at final follow-up with only 3 patients undergoing conversion to total wrist arthrodesis. Regardless of surgical technique, patients experienced improved levels of pain with a low reoperation rate, but decreased wrist range of motion and grip strength post-operatively.</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102212"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mark A. Plantz, Michael Kavanagh, Tyler Compton, Neha Gupta, Manasa Pagadala, John Carney, Erik B Gerlach, Peter J. Ostergaard, Chirag Shah
{"title":"Comparing surgical complications and healthcare utilization after forearm nonunion/malunion repair with or without the use of autograft","authors":"Mark A. Plantz, Michael Kavanagh, Tyler Compton, Neha Gupta, Manasa Pagadala, John Carney, Erik B Gerlach, Peter J. Ostergaard, Chirag Shah","doi":"10.1016/j.hansur.2025.102220","DOIUrl":"10.1016/j.hansur.2025.102220","url":null,"abstract":"<div><h3>Introduction</h3><div>There is a lack of large sample data comparing short-term complications and healthcare utilization after forearm nonunion or malunion reconstruction with or without the use autograft. The purpose of this study is to compare short-term complications and healthcare utilization after forearm nonunion or malunion repair with or without the use of autograft.</div></div><div><h3>Methods</h3><div>All cases of radius and/or ulna nonunion/malunion repair performed between January 1, 2015 and December 31, 2020 were identified using the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database. Patient demographics and surgical variables were reported, including sex, age, body mass index (BMI), medical comorbidities, American Society of Anesthesiologists (ASA) classification, and operative time. Outcomes of interest included unplanned hospital readmission, reoperation, non-home discharge, mortality, inpatient hospitalization, and various surgical and medical complications within 30 days of the index procedure. Categorical variables were compared using Chi squared tests, or Fisher’s exact test, when appropriate. Continuous variables were compared using unpaired <em>t</em>-tests. Multivariate logistic regression was used to identify variables that were independently associated with the outcomes of interest.</div></div><div><h3>Results</h3><div>1327 cases were included in the final cohort (617 with autograft use; 710 without autograft). The autograft group had more male patients, less patients aged 70 years and older, and a higher rate of class III obesity (p < 0.05). Otherwise, patient demographics, medical comorbidities, and ASA class were similar between groups (p > 0.05). The autograft group had longer operative times (132.9 ± 69.6 min vs. 101.3 ± 55.3 min, p < 0.05). The autograft group had a higher rate of inpatient hospitalization and surgical complications, largely driven by more wound complications (p < 0.05). Autograft use was independently associated with inpatient hospitalization (R.R. 4.306, 95% C.I.: [2.105–8.806]) and overall surgical complications (R.R. 2.475, 95% C.I.: [1.111–5.511]) (p < 0.05).</div></div><div><h3>Conclusion</h3><div>Forearm nonunion/malunion repair with autograft resulted in higher rates of wound complications and inpatient hospitalization compared to the non-autograft control group. Medical comorbidities, advanced age, and increased operative time were associated with various perioperative complications.</div></div><div><h3>Level of evidence</h3><div>III.</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102220"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144700761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Lateral elbow epicondylitis recognized as an occupational disease: Evaluation of return to work after surgery in 49 patients with an average follow-up of 45.6 months","authors":"Alexis Fily, Julien Maximen, Adrien Rossetti, Thierry Dréano, Mickaël Ropars","doi":"10.1016/j.hansur.2025.102174","DOIUrl":"10.1016/j.hansur.2025.102174","url":null,"abstract":"<div><h3>Objectives</h3><div>The primary objective of this study was to evaluate the return to previous work activities following surgery for lateral epicondylitis recognized as an occupational disease. The secondary objectives were to assess the relationship between preoperative and postoperative periods of work stoppage, and to determine the influence of different factors on the ability to return to previous activity.</div></div><div><h3>Material and method</h3><div>The demographic, occupational and medical data of 49 patients were analyzed retrospectively with a mean follow-up period of 45.6 months.</div></div><div><h3>Results</h3><div>At last follow-up, 26.5% of patients had returned to their previous activity. Preoperative and postoperative time off work were correlated (R = 0.331; <em>p</em> = 0.0323). Preoperative time off work of less than 12 months was significantly associated with a better ability to return to previous work (<em>p</em> = 0.017). Postoperative time off work and return to previous activity were significantly related (OR = 0.65; <em>p</em> = 0.012). The length of preoperative time off work appears to be an important factor to take into account in the context of occupational disease. The duration of postoperative time off work was consistent with French literature, but highlights significant international variability.</div></div><div><h3>Conclusion</h3><div>A quarter of patients who undergo surgery in a professional context return to their previous activity. Close collaboration among various stakeholders appears essential throughout the patient’s care pathway.</div></div><div><h3>Level of evidence</h3><div>IV. Retrospective study.</div></div>","PeriodicalId":54301,"journal":{"name":"Hand Surgery & Rehabilitation","volume":"44 4","pages":"Article 102174"},"PeriodicalIF":1.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}