Journal of Vestibular Research-Equilibrium & Orientation最新文献

{"title":"The Japanese version of the visual vertigo analogue scale: Reliability and validity.","authors":"Masato Azami, Tomohiko Kamo, Hirofumi Ogihara, Ryozo Tanaka, Takumi Kato, David Andrews, Reiko Tsunoda, Hiroaki Fushiki","doi":"10.1177/09574271261448374","DOIUrl":"10.1177/09574271261448374","url":null,"abstract":"<p><p>BackgroundVisual vertigo (VV) refers to dizziness or discomfort provoked by dynamic visual environments and is common after vestibular disorders. The Visual Vertigo Analogue Scale (VVAS) is a nine-item questionnaire developed to assess VV. However, no validated Japanese version has been available. This study aimed to translate the VVAS into Japanese (VVAS-J) and evaluate its reliability and validity.MethodsThe VVAS-J was translated and cross-culturally adapted according to standardized guidelines. The study included 168 patients with vestibular disorders and 73 healthy controls. Reliability was assessed by internal consistency and test-retest reliability using Cronbach's α, intraclass correlation coefficient [ICC(3,1)], and Cohen's κ. Validity was examined in terms of content, criterion-related, and construct validity. For criterion-related validity, VV Severity and VVAS Positive were calculated and analyzed in relation to the Dizziness Handicap Inventory (DHI), Hospital Anxiety and Depression Scale (HADS), and stabilometry. For construct validity, VV Severity and VVAS Positive were compared between patients and controls and across diagnostic subgroups.ResultsThe VVAS-J showed excellent internal consistency (Cronbach's α = 0.911) and good test-retest reliability (ICC = 0.87). VV Severity correlated strongly with the DHI (r = 0.62, <i>p</i> < 0.001) but weakly with the HADS and stabilometry. VV Severity and all items were significantly higher in patients with vestibular disorders than in controls, and highest in PPPD among diagnostic subgroups (<i>p</i> < 0.001).ConclusionThe VVAS-J demonstrated good reliability and validity, providing a simple, standardized tool to quantify VV in Japanese patients.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"265-273"},"PeriodicalIF":1.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147823108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Depersonalisation/derealisation in virtual reality is associated with vestibular sensitivity.","authors":"Sarvani Dharwada, Maria Gallagher","doi":"10.1177/09574271261485003","DOIUrl":"https://doi.org/10.1177/09574271261485003","url":null,"abstract":"<p><p>Despite significant advancements in Virtual Reality (VR) technology, exposure to VR can induce side effects on the user. One such effect is Depersonalisation and Derealisation (DPDR): feelings of detachment from the self and surroundings. The exact mechanism behind the development of DPDR symptoms following VR use is unknown. Stable representations of the bodily self depend on the integration of visual and vestibular signals. However, VR disrupts this integration. The brain is thought to resolve visuo-vestibular conflict by downweighting vestibular signals. However, whether this reweighting accounts for VR-induced DPDR has not been tested. We investigated whether changes in vestibular sensitivity are associated with DPDR. Thirty-two participants were exposed to 10 min of either roll optic flow, inducing visuo-vestibular conflict, or random dot motion, inducing no conflict. Vestibular sensitivity was assessed before and after VR using a psychophysical detection task. A moderation analysis revealed that in the roll condition, participants whose sensitivity to GVS increased following VR reported the greatest increases in DPDR, whereas no such relationship was seen in the random condition. Thus, these findings suggest that individuals who are unable to resolve the sensory conflict by vestibular-downweighting are most susceptible to DPDR.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261485003"},"PeriodicalIF":1.2,"publicationDate":"2026-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148867482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hypoxia increases vertical translation thresholds in patients with unilateral vestibular hypofunction.","authors":"Kyle A Kainec, John G Oas, Cora B Cox, Max A Teaford, Kyle A Pettijohn, Daniel M Merfeld","doi":"10.1177/09574271261483520","DOIUrl":"https://doi.org/10.1177/09574271261483520","url":null,"abstract":"<p><p>Hypoxia when breathing air with the percentage of inspired oxygen (% O₂) reduced has been shown to diminish sensory, motor, and cognitive function. We recently showed that hypoxia experienced while inspiring air with 15.4% O₂ decreased sensitivity to upward and downward motions (Z-Translations). Here, we follow-up with similar Z-Translation perceptual threshold testing in 5 patients with unilateral vestibular hypofunction. All testing was completed at an altitude of 820 ft (249 m). Each patient completed Z-Translation vestibular threshold testing with inspired % O₂ set to 20.9%, 17.9%, 16.6%, and 15.4% to mimic the effects of altitudes of 820 ft, 4000 ft, 6000 ft, or 8000 ft (249 m, 1219 m, 1828 m, or 2438 m), respectively. Z-Translation thresholds significantly increased in the hypoxic conditions (F (3,88) = 8.29, <i>p</i> = 6.48 × 10^-5). Further, greater reductions in peripheral oxygen saturation (SpO₂) significantly predicted higher Z-Translation thresholds (estimated slope = 0.67 cm/s/%, t (73.37) = -2.83, <i>p</i> = 0.006). These results provide evidence that sensing whole-body motion is susceptible to hypoxia. Extra precautions and countermeasures may be warranted for people experiencing mild reductions in blood oxygenation - especially patients with vestibular hypofunction - while performing tasks that require balance and/or accurate and precise spatial orientation.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261483520"},"PeriodicalIF":1.2,"publicationDate":"2026-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148851715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elevated interictal plasma CGRP in Meniere's disease: A headache-independent candidate biomarker distinguishing Meniere's disease from vestibular migraine.","authors":"Yutong Bai, Jin-Ju Kang, Juhee Chae, Marianne Dieterich, Min Kyung Chu, Sun-Young Oh","doi":"10.1177/09574271261481044","DOIUrl":"https://doi.org/10.1177/09574271261481044","url":null,"abstract":"<p><p>ObjectiveTo test whether interictal plasma or salivary calcitonin gene-related peptide (CGRP) distinguishes Ménière disease (MD) from vestibular migraine (VM), chronic migraine (CM), and healthy controls (HC).MethodsAdults with MD (<i>n</i> = 53), VM (<i>n</i> = 81), CM (<i>n</i> = 73), and HC (<i>n</i> = 59) provided morning interictal plasma and saliva. CGRP was measured in duplicate by ELISA. The primary contrast was plasma CGRP in MD versus VM; secondary analyses included multiplicity-corrected pairwise contrasts and ROC analysis.ResultsPlasma CGRP differed among groups (<i>p</i> < 0.001). Plasma CGRP in MD was higher than VM (75.2 [54.8-86.5] vs 37.1 [22.4-60.4] pg/mL; adjusted <i>p</i> < 0.001) and HC (37.7 [27.7-57.4] pg/mL; adjusted <i>p</i> < 0.001), but similar to CM (74.6 [49.6-101.6] pg/mL). Salivary CGRP differed overall (<i>p</i> = 0.001), driven mainly by CM versus HC, and did not separate MD from VM or HC. Plasma CGRP did not differ by headache status within MD. Plasma CGRP yielded an MD-versus-VM AUC of 0.805.ConclusionsInterictal plasma CGRP is elevated in MD relative to VM and HC, appearing independent of headache status. This assay-specific signal may support MD-versus-VM differentiation as a biological adjunct, but overlap with CM, absent severity correlations, and lack of external validation preclude disease-specific or stand-alone interpretation.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261481044"},"PeriodicalIF":1.2,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Visually induced dizziness picture system (VIDPS): From development to clinical application in dizziness assessment.","authors":"Yanli Chen, Feiyu Zhu, Yu Mao, Chi Zhang, Shengyan He, Huiyun Li, Chunhua Tang, Dongtao Wei, Jiang Qiu, Ling Li","doi":"10.1177/09574271261479634","DOIUrl":"https://doi.org/10.1177/09574271261479634","url":null,"abstract":"<p><p><b>Background:</b> Dizziness, one of the most common neurologic symptoms, is difficult to assess objectively due to a lack of standardized stimulus materials and assessment scenarios. Nonstructural dizziness is often difficult to diagnose due to the lack of an objective diagnostic basis. <b>Objective:</b> In this study, we developed a standardized picture system to trigger dizziness and assess dizziness severity. <b>Methods:</b> First, we identified the pictures through documentaries and computer post-production to extract each picture's objective features and determined the most representative objective features affecting dizziness. The subjective features of each picture were scored by healthy participants. Then, we screened 100 pictures with an even distribution of dizziness scores and used them to assess dizziness severity and optimize the assessment model. <b>Results:</b> The results showed that standard deviation (std), blurriness (blur), frequency skewness of horizontal direction (skew_h), and frequency skewness of vertical direction (skew_v) were representative objective features of the dizziness pictures, of which skew_h and skew_v were negatively correlated with the degree of dizziness. The above 100 pictures were scored by patients with dizziness. The average deviation value of dizziness was positively correlated with the Visual Vertigo Analogue Scale (VVAS) scores (<i>r</i> = 0.267, <i>p</i> < 0.05). The Generalized Anxiety Disorder-7(GAD-7) scores optimized the assessment model and affected the relationship between the average deviation value of dizziness and the VVAS scores. <b>Conclusions:</b> This standardized dizziness picture system will help clinicians and researchers to consistently and accurately assess dizziness and assist in objective diagnosis. It also provides reliable experimental materials to study pathogenesis and interventions in dizziness, especially nonstructural dizziness.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261479634"},"PeriodicalIF":1.2,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sleep's influence on susceptibility to motion sickness in parabolic flights and virtual reality: An exploratory study.","authors":"Tess Bonnard, Līva Araka, Alicia Smith Reina, Jet van Berkel, Carole Morvan, Clément Morgat, Dominique Guehl, Etienne Guillaud, Ellemarije Altena","doi":"10.1177/09574271261474571","DOIUrl":"https://doi.org/10.1177/09574271261474571","url":null,"abstract":"<p><p>ObjectivesThe relationship between sleep and motion sickness (MS) remains underexplored. This study examined whether objective sleep parameters were related to susceptibility to motion sickness, elicited by different sensory conflicts.MethodsIn a cross-over design, twenty-six participants completed a virtual reality (VR) paradigm inducing cybersickness-provoking stimuli, while twenty of them underwent a parabolic flight (PF) simulating space sickness. Actigraphy was recorded during a period of 6 nights for each paradigm to measure objective sleep quality, while subjective sleep ratings, motion sickness scores, nausea onset, and cortisol levels were collected throughout the experiment.ResultsBetter sleep quality before the paradigm-reflected by greater sleep efficiency, shorter sleep onset latency, less wake after sleep onset, and longer total sleep time-was associated with lower motion sickness severity during PF, but not with lower cybersickness in VR. Stress, whether subjective or cortisol-based, did not correlate with motion sickness levels in PF.ConclusionsOur findings show that sleep quality may protect against motion sickness in parabolic flights, independent of stress, even in those without sleep disorders. These findings identify sleep metrics as possible predictors of susceptibility to altered-gravity motion sickness.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261474571"},"PeriodicalIF":1.2,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148708448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sociodemographic bias in LLMs' clinical decision-making for dizziness.","authors":"Idit Tessler, Mahmud Omar, Amit Wolfovitz, Yoav Gimmon, Sholem Hack, Noa Rozendorn, Nir Livneh, Eyal Klang","doi":"10.1177/09574271261474218","DOIUrl":"https://doi.org/10.1177/09574271261474218","url":null,"abstract":"<p><p>ObjectiveAs large language models (LLMs) enter clinical decision support, concerns persist about sociodemographic bias. We assessed whether LLM recommendations for dizziness vary by patient descriptors and clinical detail.MethodsWe conducted a cross-randomized in-silico vignette study. One hundred synthetic emergency department dizziness cases were created using established diagnostic frameworks including the TiTrATE paradigm, SAEM GRACE-3 guidelines, and Bárány Society diagnostic criteria. Each vignette was tested in a neutral form and with 33 sociodemographic descriptor variants (34 total). Twelve instruction-tuned LLMs from multiple model families were evaluated. Models answered five binary clinical decision questions addressing etiology classification, triage disposition, neuroimaging, bedside vestibular examination, and mental health referral. Each model-vignette-descriptor combination was repeated 10 times, yielding 2,040,000 responses. Sociodemographic bias was quantified as descriptor-specific percentage-point deviations from neutral control recommendations with 95% confidence intervals.ResultsSociodemographic descriptors influenced LLM recommendations, with the largest differences observed for mental health referral decisions in diagnostically ambiguous cases. Referral likelihood was lower for Black transgender women (-12.2 pp; 95% CI -14.0 to -10.3), Black patients experiencing homelessness (-9.1 pp; -11.0 to -7.3), and patients experiencing homelessness (-7.7 pp; -9.5 to -5.9). Differences were attenuated when vignettes contained clearer diagnostic information. Other effects were smaller, including increased neuroimaging recommendations for low-income descriptors (+4.0 pp; 95% CI 2.1-5.8).ConclusionLLM clinical recommendations varied by sociodemographic descriptors, particularly under diagnostic uncertainty. More detailed clinical information reduced these disparities, suggesting structured inputs may mitigate bias in clinical AI systems.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261474218"},"PeriodicalIF":1.2,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148698146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Home-based video-oculography during spontaneous vertigo attacks: A proof-of-concept feasibility study in Ménière's disease and vestibular migraine.","authors":"Casper Grønlund, Louise Devantier, Anders Ohlhues Baandrup, Per Bækgaard, Bjarki Ditlev Djurhuus","doi":"10.1177/09574271261474573","DOIUrl":"https://doi.org/10.1177/09574271261474573","url":null,"abstract":"<p><p>BackgroundEpisodic vestibular disorders like Ménière's disease (MD) and vestibular migraine (VM) pose diagnostic challenges because patients are often assessed between attacks, when clinical signs are absent. Recording ictal eye movements could provide objective phenotypic data; however, the practicality of using unsupervised home-based video-oculography in everyday clinical settings remains poorly studied.MethodsWe conducted a prospective proof-of-concept study in patients with episodic vertigo. Participants were given portable, wireless video-oculography goggles for unsupervised home use and instructed to record eye movements during spontaneous vertigo attacks. Diagnoses were made according to the Bárány Society criteria, independent of eye-movement data. Recordings were checked for adequacy, and slow-phase velocity (SPV) was measured using a custom automated algorithm.Results50 patients participated in the study. Of these, 36 (72%) experienced vertigo during the period, and 34 of them (94%) successfully recorded ictal eye movements. The quality of recordings was sufficient for diagnostic interpretation in 97% of the participants with recordings. The median spontaneous SPV was notably higher in MD patients than in VM patients (29°/s vs 3°/s, <i>p</i> < 0.001) among participants who obtained multiple recordings from the same attack and was positively correlated with low-frequency hearing loss (ρ = 0.70, <i>p</i> < 0.001). Direction-changing nystagmus was observed in MD and mixed MD + VM phenotypes but was absent in VM alone.ConclusionsHome-based video-oculography during spontaneous vertigo attacks is practical and produces high-quality data on ictal eye movements. SPV and nystagmus patterns offer objective phenotypic details that enhance current diagnostic criteria, especially for diagnosing Ménière's disease.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261474573"},"PeriodicalIF":1.2,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148632015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subjective visual vertical testing: Influence of preset in pediatric patients.","authors":"Linda Oster, Alicia Wang, Jacob Brodsky, Guangwei Zhou","doi":"10.1177/09574271261473587","DOIUrl":"https://doi.org/10.1177/09574271261473587","url":null,"abstract":"<p><p>BackgroundPreset angle of subjective visual vertical (SVV) was reportedly playing a role in adult patients, however, this has not been investigated in pediatric patients.ObjectiveTo investigate possible impact from the preset of SVV on testing outcome in children.MethodsRetrospective review of SVV test results from 127 children with dizziness. These patients were grouped by clinical diagnoses, including vestibular migraine (VM), persistent postural-perceptual dizziness (PPPD), etc. SVV testing outcome, preset angle and direction were compared among these groups.ResultsIn all groups, there was a significant difference in SVV with rightward preset and leftward preset (<i>p</i> < 0.001). Specifically, patients were more likely to choose SVV tilting to the right in SVV trials with rightward preset but varied with leftward preset. The magnitude of preset angle did not demonstrate a statistically significant impact on the SVV score. Regression analysis with both factors was conducted to quantify the effect of SVV preset on static SVV outcome.ConclusionsThe direction of preset angle can affect the final static SVV result, with a stronger effect with rightward preset. An equal number of SVV trials in both rightward and leftward preset directions should be used to avoid bias in calculating the mean SVV deviation.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261473587"},"PeriodicalIF":1.2,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148609468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Palaeospondylus may be a new lineage of jawed vertebrates.","authors":"Bernd Fritzsch, Lionel Cavin","doi":"10.1177/09574271261471611","DOIUrl":"https://doi.org/10.1177/09574271261471611","url":null,"abstract":"<p><p><i>Palaeospondylus</i> fossils are linked to hagfish, ostracoderms, jawed vertebrates, and tetrapods, reflecting uncertain phylogenetic placement. Recent studies on <i>P. gunni</i> and <i>P. australis</i> suggest phylogenetic relationships with Tetrapodomorpha and Chondrichthyes, respectively. Jawed vertebrates are characterized by <i>three semicircular canals</i>, with two in cyclostomes. <i>Palaeospondylus</i> exhibits <i>three canals</i>, aligning it more closely with jawed vertebrates. Only <i>one otoconia</i> (sacculus) has found in <i>P. australis</i>, whereas jawed vertebrates typically have <i>at least two</i> (utricle and saccule), while cyclostomes have only one otoconia. Osteichthyes have at least six sensory epithelia, while Cyclostomes have 3-4 sensory epithelia. <i>P. australis</i> appears to have <i>around four</i> sensory epithelia, which is intermediate and unique among jawed vertebrates, potentially representing a basal condition.</p>","PeriodicalId":49960,"journal":{"name":"Journal of Vestibular Research-Equilibrium & Orientation","volume":" ","pages":"9574271261471611"},"PeriodicalIF":1.2,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148622405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}