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Aminoguanidine impedes human pancreatic tumor growth and metastasis development in nude mice

World Journal of Gastroenterology 2009年第9期15卷 1065-1071页

作者： Nora A mohamad Graciela P Cricco Lorena A Sambuco máximo Croci Vanina A medina Alicia S Gutiérrez rosa m bergoc Elena S Rivera Gabriela A martín Laboratory of Radioisotopes School of Pharmacy and BiochemistryUniversity of Buenos AiresJunín 954 (C1113AAB)Buenos AiresArgentina Institute of Immunooncology Dr. Ernesto Crescenti Av. Córdoba 3200 (C1187AAS)Buenos AiresArgentina National Research Council (CONICET) Av. Rivadavia 1917 (C1033AAJ)Buenos AiresArgentina

AIm:To study the action of aminoguanidine on pancreatic cancer xenografts in relation to cell proliferation,apoptosis,redox status and ***:Xenografts of PANC-1 cells were developed in nude mice. The animals were separated into two groups:control and aminoguanidine treated. Tumor growth,survival and appearance of metastases were determined in vivo in both groups. Tumors were excised and ex vivo histochemical studies were performed. Cell growth was assessed by Ki-67 expression. Apoptosis was studied by intratumoral expression of B cell lymphoma-2 protein (Bcl-2) family proteins and Terminal deoxynucleotidyl transferase biotin-dUTP Nick End Labeling (Tunel). Redox status was evaluated by the expression of endothelial nitric oxide synthase (eNOS),catalase,copper-zinc superoxide dismutase (CuZnSOD),manganese superoxide dismutase (mnSOD) and glutathione peroxidase (GPx). Finally,vascularization was determined by massons trichromic staining,and by VEGF and CD34 ***:Tumor volumes after 32 d of treatment by aminoguanidine (AG) were significantly lower than in control mice (P median survival of AG mice was significantly greater than control animals (P molateral and contralateral palpable metastases was significantly delayed in AG group. Apoptotic cells,intratumoral vascularization (trichromic stain) and the expression of Ki-67,Bax,eNOS,CD34,VEGF,catalase,CuZnSOD and mnSOD were diminished in AG treated mice (P moral action of aminoguanidine is associated with decreased cell proliferation,reduced angiogenesis,and reduced expression of antioxidant enzymes.

关键词： Aminoguanidine Pancreatic ductal carcinoma Tumor growth metastasis Apoptosis

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Rheological and stability analysis of cement pastes incorporating silica-based wastes

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Particuology 2024年第6期89卷 144-152页

作者： Julia da rosa martins Janaíde Cavalcante Rocha Dachamir Hotza Luciano Senff Graduate Program in materials Science and Engineering(PPGmAT) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Civil Engineering(PPGEC) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Chemical Engineering(POSENQ) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Department of mobility Engineering Federal University of Santa Catarina(UFSC)Joinville89219-600SCBrazil

This study investigates the influence of waste characteristics,especially zeta potential,on the properties of cement pastes and *** focus is to evaluate the impact of the zeta potential of cement particles and waste materials on the sedimentation speed,rheology,and hardening time of stabilized cement *** Cement II F 40,retarder additive,silica,and fly ash were used in the *** pastes were prepared,and during the stabilization period,their rheological properties and pH were *** zeta potential and sedimentation speed of the cement and waste particles were measured at the pH that the pastes presented during the entire stabilization *** the stabilization period,the pastes were subjected to the hardening time *** zeta potential analyses revealed diverse values for the different powder types,with the cement particles exhibiting a zeta potential of−3.0 mV,the silica particles exhibiting−10.5 mV,and the fly ash particles exhibiting−20.3 *** influence of the high zeta potential modulus was observed on the sedimentation speed,with the solution containing fly ash exhibiting a speed of 40.01μm/s,whereas the solution containing only cement exhibited a speed of 99.38μm/*** the pastes,the results indicate that the presence of fly ash particles with a significantly negative zeta potential led to a 16%reduction in hardening time compared to particles with a lower modulus of zeta *** tests showed that the inclusion of fly ash particles prevented the formation of *** the zeta potential influenced agglomerate formation and hardening time,it was found to have no effect on yield stress or viscosity.

关键词： Wastes Zeta potential Setting time Rheometry

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Lower Continental Crusts Involved in the Alpine Orogeny:New Insight from the Santa Lucia Nappe metasediments(Corsica,France)

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 904-920页

作者： Chiara FRASSI maria DI rosa Luca PANDOLFI michele mARRONI Dipartimento di Scienze della Terra Universitàdi PisaVia Santa Maria 5356126 PisaItaly Istituto di Geoscienze e Georisorse IGG-CNRVia Moruzzi50124 PisaItaly

In the Alpine Corsica(France),the Santa Lucia Nappe represents a peculiar unit preserving the unique relicts of Paleozoic lower to medium continental *** consists of composite basement affected by Permian granulite facies metamorphic conditions unconformably covered by a Late Cretaceous clastic sequence(Tomboni Conglomerate and Tralonca Flysch)affected by polyphase deformation and *** this work,we present a new reconstruction of the deformation events registered by the Tralonca Flysch during the Alpine *** D1 phase was testified by rare isoclinal *** D2 phase produced a continuous foliation and a map-scale sheath-fold with a top-to-W sense of *** D3 phase produced E-verging non-cylindrical folds and S3 crenulation cleavage that is not associated to metamorphic *** present the first temperature-pressure-deformation(P-T-d)path for the Tralonca Flysch,demonstrating that the Santa Lucia Nappe underwent accretion and then first stage exhumation in the Alpine wedge during the D1 phase with pressure and temperature peaks both occurred under blueschist metamorphic *** D2 phase occurred at lower pressure-temperature conditions during a second stage *** pressure-temperaturedeformation path is comparable with those of the Lower Units(i.e.,the subducted continental units of Alpine Corsica)suggesting a common geodynamic history.

关键词： blueschist-facies metamorphism P-T-d path Santa Lucia Nappe Corsica Alpine orogeny

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Anomalous negative magnetoresistance in quantum dot Josephson junctions with Kondo correlations

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Science China(Physics,mechanics & Astronomy) 2024年第8期67卷 3-13页

作者： mingtang Deng Chunlin Yu Guangyao Huang rosa López Philippe Caroff Sepideh Ghalamestani Gloria Platero Hongqi Xu Institute for Quantum Information&State Key Laboratory of High Performance Computing College of Computer Science and TechnologyNational University of Defense TechnologyChangsha 410073China NanoLund and Division of Solid State Physics Lund UniversityLund S-22100Sweden China Greatwall Quantum Laboratory Changsha 410006China Institut de Física Interdisciplinària i de Sistemes Complexos IFISC Palma de Mallorca E-07122Spain Instituto de Ciencia de materiales de madrid Madrid 28049Spain Beijing Key Laboratory of Quantum Devices Key Laboratory for the Physics and Chemistry of Nanodevicesand Department of ElectronicsPeking UniversityBeijing 100871China Beijing Academy of Quantum Information Sciences Beijing 100193China Hefei National Laboratory Hefei 230088China

The interplay between superconductivity and the Kondo effect has stimulated significant interest in condensed matter *** compete when their critical temperatures are close and can give rise to a quantum phase transition that can mimic majorana zero ***,we have fabricated and measured Al-InSb nanowire quantum dot-Al *** the Kondo regime,a supercurrent-induced zero-bias conductance peak *** zero-bias peak shows an anomalous negative magnetoresistance(NmR)at weak magnetic *** attribute this anomalous NmR to quasiparticle trapping at vortices in the superconductor leads as a weak magnetic field is *** trapping effect lowers the quasiparticle-caused dissipation and thus enhances the Josephson *** work connects the vortex physics and the supercurrent tunneling in Kondo regimes and can help further understand the physics of Josephson quantum dot system.

关键词： quantum dot Kondo correlation InSb nanowire quasiparticle trapping

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Hypothalamic circuits and aging:keeping the circadian clock updated

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Neural Regeneration Research 2024年第9期19卷 1919-1928页

作者： rosa Vázquez-Lizarraga Lucia mendoza-Viveros Carolina Cid-Castro Sareni Ruiz-montoya Erick Carreño-Vázquez Ricardo Orozco-Solis Instituto Nacional de medicina Genómica(INmEGEN) México CityMéxico Centro de Investigacíon sobre el Envejecimiento Centro de Investigacíon y de Estudios Avanzados(CIE-CINVESTAV)México CityMéxico Instituto de Investigaciones Biomédicas Universidad Nacional Autónoma de México UNAMMéxico CityMéxico

Over the past century,age-related diseases,such as cancer,type-2 diabetes,obesity,and mental illness,have shown a significant increase,negatively impacting overall quality of *** on aged animal models have unveiled a progressive discoordination at multiple regulatory levels,including transcriptional,translational,and post-translational processes,resulting from cellular stress and circadian *** circadian clock emerges as a key regulator,sustaining physiological homeostasis and promoting healthy aging through timely molecular coordination of pivotal cellular processes,such as stem-cell function,cellular stress responses,and inter-tissue communication,which become disrupted during *** the crucial role of hypothalamic circuits in regulating organismal physiology,metabolic control,sleep homeostasis,and circadian rhythms,and their dependence on these processes,strategies aimed at enhancing hypothalamic and circadian function,including pharmacological and non-pharmacological approaches,offer systemic benefits for healthy *** brain-directed drug administration represents a promising avenue for effectively targeting specific brain regions,like the hypothalamus,while reducing side effects associated with systemic drug delivery,thereby presenting new therapeutic possibilities for diverse age-related conditions.

关键词： aging astrocytes cellular stress responses circadian clock hypothalamus intranasal drug administration metabolic control nutrient sensor SIRT1 sleep homeostasis

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Efficacy of 1% Permethrin and 2% Permethrin Combined with 1% Piperonyl Butoxide against Rhipicephalus sanguineus Ticks in Naturally Infested Dogs

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Pharmacology & Pharmacy 2024年第7期15卷 237-247页

作者： Andrea márquez-Aguado Froylán Ibarra-Velarde Joaquín Ambia-medina rosa Arias-García Departamento de Parasitologa Facultad de Medicina Veterinaria y Zootecnia Universidad Nacional Autnoma de Mxico Mexico City Mxico Laboratorios Salud Animal S.A de C.V. Mexico City Mxico

The aim of the present study was to compare the ixodicide efficacy of 1% permethrin applied as a shampoo-bath in single treatment and a combined formulation of 2% permethrin + 1% piperonyl butoxide applied as powder in a single treatment against Rhipicephalus sanguineus ticks, in naturally infested dogs. Eighteen adult cross-mixed dogs, harboring to at least 20 ticks/animal, were selected on pre-treatment live tick counts. On day 0, the dogs were then divided in 3 groups of 6 animals each, for treatment: Group 1 (G1) received 1% permethrin applied as shampoo-bath (approximately 10 ml/kg bw), according to label instructions. G2 was treated with 2% permethrin + 1% piperonyl butoxide applied as powder, and rubbed as massage on the body, as recommended by the producer. G3 served as a non-treated control. After the treatment, the dogs were checked out for live ticks counting on days 0, 1, 7, and 14. The ixodicide efficacy was assessed based on the percentage reductions of ticks on the days analyzed post-treatment, with respect to the untreated control. Results showed that permethrin alone removed ticks on 81%, 93.1% and 89.6% for days 1, 7 and 14, respectively. The combined formulation of 2% permethrin + 1% piperonyl butoxide exerted a better efficacy of 98.8, 97.7 and 97.0%, respectively. It is concluded that this combined formulation was highly effective at rapidly repelling and killing Riphicephalus sanguineus ticks on naturally infected dogs, showing a significant effect on days 1, 7 and 14 after tick exposure. The sustained high and quick level of efficacy of this combination may well interfere with the transmission of Riphicephalus sanguineus ticks. It is concluded that the sustained high level of efficacy of the permethrin + piperonyl butoxide combination may well exert an additive effect and could interfere with the transmission of Riphicephalus sanguineus ticks.

关键词： Efficacy Permethrin Permethrin + Piperonyl Butoxide Riphicephalus sanguineus Dogs

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Dietary(poly)phenol intake is associated with cardiometabolic health parameters in adolescents

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Food Science and Human Wellness 2024年

作者： Emily P.Laveriano-Santos Sara Castro-Barquero Camila Arancibia-Riveros Ana maría Ruiz-León rosa Casas Ramón Estruch Patricia Bodega mercedes de miguel Amaya de Cos-Gandoy Jesús martínez-Gómez Gloria Santos-Beneit Juan m.Fernández-Alvira Rodrigo Fernández-Jiménez rosa m.Lamuela-Raventós Anna Tresserra-Rimbau The Zena and michael A.Wiener Cardiovascular Institute， Icahn School of medicine at mount Sinai Department de Nutrició， Ciències de l'Alimentació I Gastronomia， XIA， Facultat de Farmàcia i Ciències de l'alimentació， Institut de Recerca en Nutrició i Seguretat Alimentària (INSA-UB)， Universitat de Barcelona Department of Internal medicine， Hospital Clínic， Institutd'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS)， University of Barcelona Consorcio CIBER， m.P.Fisiopatología de la Obesidad y Nutrición (CIBERObn)， Instituto de Salud Carlos III (ISCIII) mediterranean Diet Foundation 5. Foundation for Science， Health and Education (SHE) 6. Centro Nacional de Investigaciones Cardiovasculares (CNIC) CIBER de Enfermedades Cardiovasculares (CIBERCV) 9. Hospital Universitario Clínico San Carlos

Background: The protective role of (poly)phenols against metabolic disorders has been extensively studied in adults but not in ***: To assess associations of dietary (poly)phenols and their subclasses with cardiometabolic health parameters in adolescents. methods: A cross-sectional study was conducted in 944 individuals aged 11 to 14 years enrolled in the SI! Program for Secondary Schools trial (NCT03504059). (Poly)phenol intake was assessed using semi-quantitative food frequency questionnaires and the Phenol-Explorer database. The measured cardiometabolic parameters were waist circumference (WC) age-sex z-score， blood pressure (BP) age-sex z-score， blood glucose (BG)， triglycerides (TG)， and high-density lipoprotein cholesterol (HDL-c). multilevel mixed-effect linear regression models were applied to examine the association between (poly)phenol quintiles and cardiometabolic health ***: Compared to the lowest quintile， adolescents in the highest quintile of total (poly)phenol intake had lower WC z-scores (β=-0.09， 95%CI=-0.09;-0.08， P-for trend=0.002)， mean arterial pressure z-scores (β =-0.11， 95%CI=-0.12;-0.09， P-for trend=0.206)， and HDL-c (β=-1.52， 95%CI=-2.90;-0.14， P-for trend=0.108)， after multivariable adjustment. The WC z-scores (β=-0.11， 95%CI=-0.19;-0.03， P-for trend=0.013) and HDL-c (β=-2.16， 95%CI=-3.78;-0.53， P-for trend=0.046) were lower in the highest quintile of flavonoid intake compared to the lowest quintile. The highest quintile of phenolic acid intake was associated with a lower WC z-score (β=-0.14， 95%CI=-0.26;-0.02， P-for trend=0.011) and TG levels (β=-8.83， 95%CI=-12.37;-5.30， P-for trend mpared to the lowest quintile. Conclusion: A higher intake of (poly)phenols， espe

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Histopathological impact of SARS-CoV-2 on the liver:Cellular damage and long-term complications

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World Journal of Gastroenterology 2024年第22期30卷 2866-2880页

作者： Alfonso Rodriguez-Espada moises Salgado-de la mora Briana mariette Rodriguez-Paniagua Nathaly Limonde la rosa monica Itzel martinez-Gutierrez Santiago Pastrana-Brandes Nalu Navarro-Alvarez Department of molecular Biology Universidad Panamericana School of MedicineCampus MéxicoMexico 03920Mexico Department of Internal medicine Instituto Nacional de Ciencias Médicas y Nutrición Salvador ZubiránMexico 14080Mexico Department of Surgery University of Colorado Anschutz Medical CampusDenverCO 80045United States PECEm Facultad de MedicinaUniversidad Nacional Autónoma de MéxicoMexico 04360Mexico Department of Gastroenterology Instituto Nacional de Ciencias Médicas y Nutrición Salvador ZubiránMexico 14080Mexico

Coronavirus disease 2019(COVID-19),caused by the highly pathogenic severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),primarily impacts the respiratory tract and can lead to severe outcomes such as acute respiratory distress syndrome,multiple organ failure,and *** extensive studies on the pathogenicity of SARS-CoV-2,its impact on the hepatobiliary system remains *** liver injury is commonly indicated by reduced albumin and elevated bilirubin and transaminase levels,the exact source of this damage is not fully *** mechanisms for injury include direct cytotoxicity,collateral damage from inflammation,drug-induced liver injury,and ischemia/***,evidence often relies on blood tests with liver enzyme *** this comprehensive review,we focused solely on the different histopathological manifestations of liver injury in COVID-19 patients,drawing from liver biopsies,complete autopsies,and in vitro liver *** present evidence of the direct impact of SARS-CoV-2 on the liver,substantiated by in vitro observations of viral entry mechanisms and the actual presence of viral particles in liver samples resulting in a variety of cellular changes,including mitochondrial swelling,endoplasmic reticulum dilatation,and hepatocyte *** ly,we describe the diverse liver pathology observed during COVID-19 infection,encompassing necrosis,steatosis,cholestasis,and lobular *** also discuss the emergence of long-term complications,notably COVID-19-related secondary sclerosing *** the histopathological liver changes occurring during COVID-19 infection is pivotal for improving patient recovery and guiding decision-making.

关键词： Liver SARS-CoV-2 COVID-19 Angiotensin-converting enzyme 2 Histopathology Liver biopsies Liver autopsy In vitro

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microbial phenolic metabolites are associated with better frontal lobe cognition

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Food Science and Human Wellness 2024年

作者： Inés Domínguez-López Isabella Parilli-moser Anna Vallverdú-Queralt Anna Tresserra-Rimbau Cinta Valls-Pedret Zenaida Vázquez-Ruiz Olga Casta?er Ramon Estruch Emili Ros rosa m.Lamuela-Raventós Lipid Clinic， Endocrinology and Nutrition Service， Institut d'Investigacions Biomèdiques August Pi i Sunyer， Hospital Clínic 08036 Barcelona， Spain Unit of Cardiovascular Risk and Nutrition， Institut Hospital del mar de Investigaciones médicas (ImIm) Department of Preventive medicine and Public Health， University of Navarra Departament de Nutrició， Ciències de l'Alimentació i Gastronomía， Facultat de Farmacia， Universitat de Barcelon (UB)， Av.de Joan XXII Department of Endocrinology， Hospital Clinic IDIBAPS， Barcelona， Spain Department of Internal medicine， Hospital Clinic， Institut d'Investigació Biomèdica August Pi i Sunyer (IDIBAPS)， University of Barcelona CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN)， Instituto de Salud Carlos III Institut de Nutrició i Seguretat Alimentària (INSA)， Universitat de Barcelona (UB)

With increasing life expectancy， neurodegenerative diseases have become one of the leading causes of ill-health in the elderly. Preventive strategies include following healthy diets， such as the mediterranean diet， which is particularly rich in polyphenols， bioactive compounds with neuroprotective properties. The aim of this study was to assess the association of microbial phenolic metabolites (mPm) with cognition. This cross-sectional analysis was performed with 200 participants of the PREDImED trial (Barcelona-Clinic recruitment center). A novel method based on liquid chromatography coupled to mass spectrometry was used to identify urinary mPm (protocatechuic acid， enterodiol glucuronide， enterolactone glucuronide， urolithin B glucuronide， and vanillic acid glucuronide)， and cognitive function was evaluated with neuropsychological tests. multivariable-adjusted ordinary least squares regression was used to assess the associations between cognitive function and mPm， and a score was calculated as the weighted sum of mPm. A higher mPm score was associated with better frontal lobe function. Among individual metabolites， vanillic acid glucuronide was correlated with frontal cognitive performance. Participants with higher concentrations of vanillic acid glucuronide and urolithin B glucuronide obtained better scores in the Color Trail Test part 2. A higher score for urinary multi-mPm was associated with better frontal cognitive performance in an older mediterranean population.

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The Iberian Roma Population Variant Server(IRPVS)

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Journal of Genetics and Genomics 2024年第7期51卷 769-773页

作者： Fabiola mavillard Javier Perez-Florido Francisco m.Ortuño Amador Valladares miren L.Álvarez-Villegas Gema Roldán rosario Carmona manuel Soriano Santiago Susarte Pilar Fuentes Daniel López-López Ana maría Nuñez-Negrillo Alejandra Carvajal Yolanda morgado Daniel Arteaga rosa Ufano Pablo mir Juan F.Gamella Joaquín Dopazo Carmen Paradas macarena Cabrera-Serrano Instituto de Biomedicina de Sevilla(IBiS) Hospital Universitario Virgen del Rocío/CSIC/Universidad de SevillaSevillaSpain Centro Investigación Biomédica en Red Enfermedades Neurodegenerativas(CIBERNED) Instituto de Salud CarlosⅢSevillaSpain Plataforma Andaluza de medicina Computacional Fundación Progreso y Salud(FPS)Hospital Virgen del RocíoSevillaSpain Grupo de medicina computacional de sistemas Instituto de Biomedicina de Sevilla(IBiS)Hospital Virgen del RocíoSevillaSpain Nodo de Genómica Funcional (INB-ELIXIR-es)Fundación Progreso y Salud(FPS)Hospital Virgen del RocíoSevilla 41013Spain Bioinformática en Enfermedades raras(BiER) Centro de Investigación Biomédica en Red de Enfermedades Raras(CIBERER)Instituto de salud CarlosⅢSevillaSpain Departamento de Ingeniería de Computadores Automática y RobóticaUniversidad de GranadaGranadaSpain Servicio de Urgencias de Atención Primaria Distrito SevillaSevillaSpain Centro de Servicios Sociales Negociado de Servicios EspecializadosAyuntamiento de SevillaSevillaSpain Departamento de Enfermería Facultad de Ciencias de la SaludUniversidad de GranadaGranadaSpain Departamento de Neurología Hospital Virgen de las NievesGranadaSpain Departamento de Neurología Hospital Virgen de ValmeSevillaSpain Centro de Salud Utrera Sur SevillaSpain Centro de Salud Polígono Sur SevillaSpain Unidad de Trastornos del movimiento Servicio de Neurología y Neurofisiología ClínicaHospital Universitario Virgen del RocíoSevillaSpain Departamento de medicina Facultad de MedicinaUniversidad de SevillaSevilleSpain Departamento de Antropología Social Universidad de GranadaSpain Unidad Enfermedades Neuromusculares Servicio de Neurología y Neurofisiología ClínicaHospital Universitario Virgen del RocíoSevillaSpain

In recent years,the number of known disease genes has exponentially grown due to the widespread adoption of cost-effective massive parallel *** identify new disease variants,especially in monogenic disorders,a frequen... 详细信息

关键词： Server filtering massive

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