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    16671 results match your criteria Circulation research[Journal]

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    PDK4 Inhibits Cardiac Pyruvate Oxidation in Late Pregnancy.
    Circ Res 2017 Sep 19. Epub 2017 Sep 19.
    Cardiovascular Institute, University of Pennsylvania
    Rationale: Pregnancy profoundly alters maternal physiology. The heart hypertrophies during pregnancy, but its metabolic adaptations are not well understood. Objective: To determine the mechanisms underlying cardiac substrate use during pregnancy. Read More

    Dose Comparison Study of Allogeneic Mesenchymal Stem Cells in Patients with Ischemic Cardiomyopathy (The TRIDENT Study).
    Circ Res 2017 Sep 18. Epub 2017 Sep 18.
    Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine
    Rationale: Cell dose and concentration play crucial roles in phenotypic responses to cell-based therapy for heart failure. Objective: To compare the safety and efficacy of two doses of allogeneic bone marrow-derived human mesenchymal stem cells (hMSC) identically delivered in patients with ischemic cardiomyopathy (ICM). Methods and Results: Thirty patients with ICM received in a blinded manner either 20 million (20M, n=15) or 100 million (100M, n=15) allogeneic hMSCs via transendocardial injection (10 0. Read More

    P2Y2 Nucleotide Receptor Prompts Human Cardiac Progenitor Cell Activation by Modulating Hippo Signaling.
    Circ Res 2017 Sep 18. Epub 2017 Sep 18.
    San Diego Heart Research Institute, San Diego State University
    Rationale: Autologous stem cell therapy using human c-Kit(+) cardiac progenitor cells (hCPCs) is a promising therapeutic approach for treatment of heart failure (HF). However, hCPCs derived from aged HF patients with genetic predispositions and/or comorbidities of chronic diseases exhibit poor proliferative and migratory capabilities, which impairs overall reparative potential for injured myocardium. Therefore, empowering functionally compromised hCPCs with pro-regenerative molecules ex vivo is crucial for improving the therapeutic outcome in HF patients. Read More

    GJA1-20k Arranges Actin to Guide Cx43 Delivery to Cardiac Intercalated Discs.
    Circ Res 2017 Sep 18. Epub 2017 Sep 18.
    Heart Institute, Cedars-Sinai Medical Center
    Rationale: Delivery of connexin 43 (Cx43) to the intercalated disc is a continuous and rapid process critical for intercellular coupling. By a pathway of targeted delivery involving microtubule highways, vesicles of Cx43 hemichannels are efficiently trafficked to adherens junctions at intercalated discs. It has also been identified that actin provides rest stops for Cx43 forward trafficking, and that Cx43 has a 20kDa internally translated small C-terminus isoform (GJA1-20k) which is required for full-length Cx43 trafficking, but by an unknown mechanism. Read More

    Modern Imaging Techniques in Cardiomyopathies.
    Circ Res 2017 Sep;121(7):874-891
    From Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, WI.
    Modern advanced imaging techniques have allowed increasingly more rigorous assessment of the cardiac structure and function of several types of cardiomyopathies. In contemporary cardiology practice, echocardiography and cardiac magnetic resonance imaging are widely used to provide a basic framework in the evaluation and management of cardiomyopathies. Echocardiography is the quintessential imaging technique owing to its unique ability to provide real-time images of the beating heart with good temporal resolution, combined with its noninvasive nature, cost-effectiveness, availability, and portability. Read More

    Pediatric Cardiomyopathies.
    Circ Res 2017 Sep;121(7):855-873
    From the Department of Pediatrics, Columbia University Medical Center, New York, NY (T.M.L., W.K.C., L.J.A.); Department of Pediatrics, Albert Einstein College of Medicine, The Children's Hospital at Montefiore, Bronx, NY (D.T.H., J.M.L.); Department of Pediatrics, Stollery Children's Hospital, University of Alberta, Edmonton, Canada (P.K.); Department of Pediatrics, The Heart Institute, Le Bonheur Children's Hospital, Memphis, TN (J.A.T.); Indiana University School of Medicine, Indianapolis (S.M.W.); Department of Cardiology, Boston Children's Hospital, MA (S.D.C.); Department of Pediatrics, Cincinnati Children's Hospital Medical Center, OH (J.L.J., E.M.M.); Department of Pediatrics, Children's Hospital of Philadelphia, PA (J.W.R.); Department of Pediatrics, Washington University School of Medicine, St. Louis, MO (C.D.C.); Department of Pediatrics, Primary Children's Hospital, Salt Lake City, UT (A.K.L.); Department of Pediatrics, Ann and Robert H. Lurie Children's Hospital, Chicago, IL (P.T.T.); and Department of Pediatrics, Wayne State University School of Medicine and Children's Hospital of Michigan, Detroit (J.D.C., H.R., A.H., S.E.L.).
    Pediatric cardiomyopathies are rare diseases with an annual incidence of 1.1 to 1.5 per 100 000. Read More

    Cardiomyopathies Due to Left Ventricular Noncompaction, Mitochondrial and Storage Diseases, and Inborn Errors of Metabolism.
    Circ Res 2017 Sep;121(7):838-854
    From the Le Bonheur Children's Hospital, St Jude Children's Research Hospital, University of Tennessee Health Science Center, Memphis; and Cincinnati Children's Hospital Medical Center, University of Cincinnati, OH.
    The normal function of the human myocardium requires the proper generation and utilization of energy and relies on a series of complex metabolic processes to achieve this normal function. When metabolic processes fail to work properly or effectively, heart muscle dysfunction can occur with or without accompanying functional abnormalities of other organ systems, particularly skeletal muscle. These metabolic derangements can result in structural, functional, and infiltrative deficiencies of the heart muscle. Read More

    Restrictive Cardiomyopathy: Genetics, Pathogenesis, Clinical Manifestations, Diagnosis, and Therapy.
    Circ Res 2017 Sep;121(7):819-837
    From the Division of Hematology (E.M., M.A.G.) and Department of Cardiovascular Medicine (L.A.B.), Mayo Clinic, Rochester, MN.
    Restrictive cardiomyopathy (RCM) is characterized by nondilated left or right ventricle with diastolic dysfunction. The restrictive cardiomyopathies are a heterogenous group of myocardial diseases that vary according to pathogenesis, clinical presentation, diagnostic evaluation and criteria, treatment, and prognosis. In this review, an overview of RCMs will be presented followed by a detailed discussion on 3 major causes of RCM, for which tailored interventions are available: cardiac amyloidosis, cardiac sarcoidosis, and cardiac hemochromatosis. Read More

    Inflammatory Cardiomyopathic Syndromes.
    Circ Res 2017 Sep;121(7):803-818
    From the Houston Methodist DeBakey Heart and Vascular Center (B.H.T.), TX; University of Miami Leonard Miller School of Medicine, FL (J.M.H.); and Interdisciplinary Stem Cell Institute, Miami, FL (J.M.H.).
    Inflammatory activation occurs in nearly all forms of myocardial injury. In contrast, inflammatory cardiomyopathies refer to a diverse group of disorders in which inflammation of the heart (or myocarditis) is the proximate cause of myocardial dysfunction, causing injury that can range from a fully recoverable syndrome to one that leads to chronic remodeling and dilated cardiomyopathy. The most common cause of inflammatory cardiomyopathies in developed countries is lymphocytic myocarditis most commonly caused by a viral pathogenesis. Read More

    Arrhythmogenic Cardiomyopathy.
    Circ Res 2017 Sep;121(7):784-802
    From the Department of Cardiac, Thoracic, and Vascular Sciences, University of Padova Medical School, Italy (D.C., C.B.); and Department of Medicine/Cardiology, Center for Inherited Heart Disease, Johns Hopkins University School of Medicine, Baltimore, MD (D.P.J.).
    Arrhythmogenic cardiomyopathy is an inherited heart muscle disorder, predisposing to sudden cardiac death, particularly in young patients and athletes. Pathological features include loss of myocytes and fibrofatty replacement of right ventricular myocardium; biventricular involvement is often observed. It is a cell-to-cell junction cardiomyopathy, typically caused by genetically determined abnormalities of cardiac desmosomes, which leads to detachment of myocytes and alteration of intracellular signal transduction. Read More

    Hypertrophic Obstructive Cardiomyopathy: Surgical Myectomy and Septal Ablation.
    Circ Res 2017 09;121(7):771-783
    From the Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN (R.A.N.); Medizinische Klinik 1, Leopoldina Krankenhaus, Schweinfurt, Germany (H.S.); and Department of Cardiovascular Surgery, Rochester, MN (H.V.S.).
    Hypertrophic cardiomyopathy is a genetic disorder characterized by marked hypertrophy of the myocardium. It is frequently accompanied by dynamic left ventricular outflow tract obstruction and symptoms of dyspnea, angina, and syncope. The initial therapy for symptomatic patients with obstruction is medical therapy with β-blockers and calcium antagonists. Read More

    Hypertrophic Cardiomyopathy: Genetics, Pathogenesis, Clinical Manifestations, Diagnosis, and Therapy.
    Circ Res 2017 Sep;121(7):749-770
    From the Center for Cardiovascular Genetics, Institute of Molecular Medicine, Department of Medicine, University of Texas Health Sciences Center at Houston (A.J.M.); Texas Heart Institute, Houston (A.J.M.); and TIMI Study Group, Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA (E.B.).
    Hypertrophic cardiomyopathy (HCM) is a genetic disorder that is characterized by left ventricular hypertrophy unexplained by secondary causes and a nondilated left ventricle with preserved or increased ejection fraction. It is commonly asymmetrical with the most severe hypertrophy involving the basal interventricular septum. Left ventricular outflow tract obstruction is present at rest in about one third of the patients and can be provoked in another third. Read More

    Dilated Cardiomyopathy: Genetic Determinants and Mechanisms.
    Circ Res 2017 Sep;121(7):731-748
    From the Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago IL (E.M.M.); and Cardiovascular Institute, University of Colorado Anschutz Medical Campus, Aurora (L.M.).
    Nonischemic dilated cardiomyopathy (DCM) often has a genetic pathogenesis. Because of the large number of genes and alleles attributed to DCM, comprehensive genetic testing encompasses ever-increasing gene panels. Genetic diagnosis can help predict prognosis, especially with regard to arrhythmia risk for certain subtypes. Read More

    Classification, Epidemiology, and Global Burden of Cardiomyopathies.
    Circ Res 2017 Sep;121(7):722-730
    From the Imperial College London, United Kingdom (W.J.M.); Hypertrophic Cardiomyopathy Institute, Division of Cardiology, Tufts Medical Center, Boston, MA (B.J.M.); and Department of Cardiac, Thoracic and Vascular Sciences, University of Padua Medical School, Italy (G.T.).
    In the past 25 years, major advances were achieved in the nosography of cardiomyopathies, influencing the definition and taxonomy of this important chapter of cardiovascular disease. Nearly, 50% of patients dying suddenly in childhood or adolescence or undergoing cardiac transplantation are affected by cardiomyopathies. Novel cardiomyopathies have been discovered (arrhythmogenic, restrictive, and noncompacted) and added to update the World Health Organization classification. Read More

    Cardiomyopathies: An Overview.
    Circ Res 2017 Sep;121(7):711-721
    From the TIMI Study Group, Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA.
    The nonischemic cardiomyopathies are a diverse group of cardiac disorders that frequently cause heart failure and death and are now recognized with increasing frequency. There has been substantial progress in the clinical recognition and understanding of the natural history of these conditions. Well-established and new techniques of cardiac imaging are also helpful in this regard. Read More

    Cortical Bone Stem Cell Therapy Preserves Cardiac Structure and Function After Myocardial Infarction.
    Circ Res 2017 Sep 14. Epub 2017 Sep 14.
    Cardiovascular Research Center, Temple University School of Medicine
    Rationale: Cortical bone stem cells (CBSCs) have been shown to reduce ventricular remodeling and improve cardiac function in a murine myocardial infarction (MI) model. These effects were superior to other stem cell types that have been used in recent early stage clinical trials. However, CBSC efficacy has not been tested in a preclinical large animal model using approaches that could be applied to patients. Read More

    CELF1 Mediates Connexin 43 mRNA Degradation in Dilated Cardiomyopathy.
    Circ Res 2017 Sep 5. Epub 2017 Sep 5.
    Institute of Biomedical Sciences, Academia Sinica
    Rationale: Downregulation of connexin 43 (Cx43), the major cardiac gap junction protein, is often associated with arrhythmia, dilated cardiomyopathy (DCM) and heart failure. However, the cause of the reduced expression remains elusive. Re-induction of a nuclear RNA-binding protein CUGBP, Elav-like family member 1 (CELF1) in the adult heart has been implicated in the cardiac pathogenesis of myotonic dystrophy type 1 (DM1). Read More

    Reducing the Global Burden of Cardiovascular Disease, Part 2: Prevention and Treatment of Cardiovascular Disease.
    Circ Res 2017 Sep;121(6):695-710
    From the Population Health Research Institute, McMaster University and Hamilton Health Sciences, Ontario, Canada (D.P.L., P.G.J., S.S.A., K.K.T., J.-D.S., S.Y.); and London School of Hygiene and Tropical Medicine, United Kingdom (M.M.).
    In this second part of a 2-part series on the global burden of cardiovascular disease, we review the proven, effective approaches to the prevention and treatment of cardiovascular disease. We specifically review the management of acute cardiovascular diseases, including acute coronary syndromes and stroke; the care of cardiovascular disease in the ambulatory setting, including medical strategies for vascular disease, atrial fibrillation, and heart failure; surgical strategies for arterial revascularization, rheumatic and other valvular heart disease, and symptomatic bradyarrhythmia; and approaches to the prevention of cardiovascular disease, including lifestyle factors, blood pressure control, cholesterol-lowering, antithrombotic therapy, and fixed-dose combination therapy. We also discuss cardiovascular disease prevention in diabetes mellitus; digital health interventions; the importance of socioeconomic status and universal health coverage. Read More

    Reducing the Global Burden of Cardiovascular Disease, Part 1: The Epidemiology and Risk Factors.
    Circ Res 2017 Sep;121(6):677-694
    From the Population Health Research Institute, McMaster University and Hamilton Health Sciences, Ontario, Canada (P.J., D.L., S.S.A., J.-D.S., K.T., A.M., S.Y.); and London School of Hygiene and Tropical Medicine, United Kingdom (M.M.).
    Current global health policy goals include a 25% reduction in premature mortality from noncommunicable diseases by 2025. In this 2-part review, we provide an overview of the current epidemiological data on cardiovascular diseases (CVD), its risk factors, and describe strategies aimed at reducing its burden. In part 1, we examine the global epidemiology of cardiac conditions that have the greatest impact on CVD mortality; the predominant risk factors; and the impact of upstream, societal health determinants (eg, environmental factors, health policy, and health systems) on CVD. Read More

    Smooth Muscle Differentiation Control Comes Full Circle: The Circular Noncoding RNA, circActa2, Functions as a miRNA Sponge to Fine-Tune α-SMA Expression.
    Circ Res 2017 Sep;121(6):591-593
    From the Division of Renal Diseases and Hypertension, Department of Medicine, Cardiovascular Pulmonary Research Program and Division of Cardiology, School of Medicine, Consortium for Fibrosis Research and Translation, University of Colorado, Anschutz Medical Campus, Aurora.

    Regulation of Macrophage Apoptosis and Atherosclerosis by Lipid Induced PKCδ Isoform Activation.
    Circ Res 2017 Aug 30. Epub 2017 Aug 30.
    Dianne Nunnall Hoppes Laboratory for Diabetes Complications, Joslin Diabetes Center
    Rationale: Activation of monocytes/macrophages by hyperlipidemia associated with diabetes and obesity contributes to the development of atherosclerosis. PKCδ expression and activity in monocytes were increased by hyperlipidemia and diabetes with unknown consequences to atherosclerosis. Objective: To investigate the effect of PKCδ activation in macrophages on the severity of atherosclerosis. Read More

    MerTK Cleavage on Resident Cardiac Macrophages Compromises Repair after Myocardial Ischemia Reperfusion Injury.
    Circ Res 2017 Aug 29. Epub 2017 Aug 29.
    Feinberg Cardiovascular Research Institute, Northwestern University
    Rationale: Clinical benefits of reperfusion after myocardial infarction (MI) are offset by maladaptive innate immune cell function and therapeutic interventions are lacking. Objective: We sought to test the significance of phagocytic clearance by resident and recruited phagocytes after myocardial ischemia reperfusion (I/R). Methods and Results: In humans, we discovered that clinical reperfusion after MI led to significant elevation of the soluble form of MerTK (i. Read More

    Postnatal Cardiac Gene-Editing Using CRISPR/Cas9 with AAV9-Mediated Delivery of Short Guide RNAs Results in Mosaic Gene Disruption.
    Circ Res 2017 Aug 29. Epub 2017 Aug 29.
    Molecular Cardiology, Hubrecht Institute
    Rationale: CRISPR/Cas9-based DNA editing has rapidly evolved as an attractive tool to modify the genome. Although CRISPR/Cas9 has been extensively used to manipulate the germline in zygotes, its application in postnatal gene editing remains incompletely characterized. Objective: To evaluate the feasibility of CRISPR/Cas9-based cardiac genome editing in vivo in postnatal mice. Read More

    Activation of γ2-AMPK Suppresses Ribosome Biogenesis and Protects Against Myocardial Ischemia/Reperfusion Injury.
    Circ Res 2017 Aug 23. Epub 2017 Aug 23.
    Anesthesiology and Pain Medicine, University of Washington
    Rationale: AMP-activated protein kinase (AMPK) is a heterotrimeric protein that plays an important role in energy homeostasis and cardioprotection. Two isoforms of each subunit are expressed in the heart but the isoform-specific function of AMPK remains unclear. Objective: We sought to determine the role of γ2-AMPK in cardiac stress response using bioengineered cell lines and mouse models containing either isoform of the γ-subunit in the heart. Read More

    Macrophage Liver Kinase B1 Inhibits Foam Cell Formation and Atherosclerosis.
    Circ Res 2017 Aug 21. Epub 2017 Aug 21.
    Center for Molecular and Translational Medicine, Georgia State University
    Rationale: Liver kinase B1 (LKB1) is a serine/threonine kinase and tumor suppressor, which regulates the homeostasis of hematopoietic cells and immune responses. Macrophages transform into foam cells upon taking-in lipids. No role for LKB1 in foam cell formation has previously reported. Read More

    Targeting miR-423-5p Reverses Exercise Training-Induced HCN4 Channel Remodeling and Sinus Bradycardia.
    Circ Res 2017 Aug 17. Epub 2017 Aug 17.
    Cardiovascular Sciences, University of Manchester
    Rationale: Downregulation of the pacemaking ion channel, HCN4, and the corresponding ionic current, If, underlies exercise training-induced sinus bradycardia in rodents. If this occurs in humans, it could explain the increased incidence of bradyarrhythmias in veteran athletes and it will be important to understand the underlying processes. Objective: To test the role of HCN4 in the training-induced bradycardia in human athletes and investigate the role of micro-RNAs (miRs) in the repression of HCN4. Read More

    Cardiovascular Research in Germany.
    Circ Res 2017 Aug;121(5):492-495
    From the Institute for Pathophysiology, West German Heart and Vascular Center, University of Essen Medical School (G.H.); University Medical Center Hamburg Eppendorf, Germany (T.E.); German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck (T.E.); Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, University Frankfurt, Germany (S.D.); and German Centre for Cardiovascular Research (DZHK), partner site Rhine-Main (S.D.).

    Allele-Specific Gene Silencing: Another Step in the Inexorable Advance of Gene Therapy for Cardiac Arrhythmia Management.
    Circ Res 2017 Aug;121(5):480-482
    From the Department of Medicine and Research Center, Montreal Heart Institute and Université de Montréal; Departments of Medicine and Pharmacology and Therapeutics, McGill University, Montreal, Canada; Institute of Pharmacology, West German Heart and Vascular Center, Faculty of Medicine, University Duisburg-Essen, Essen, Germany.

    Cardiovascular Event Prediction by Machine Learning: The Multi-Ethnic Study of Atherosclerosis.
    Circ Res 2017 Aug 9. Epub 2017 Aug 9.
    Cardiology, Johns Hopkins University
    Rationale: Machine learning may be useful to characterize cardiovascular risk, predict outcomes and identify biomarkers in population studies. Objective: To test the ability of random survival forests (RF), a machine learning technique, to predict six cardiovascular outcomes in comparison to standard cardiovascular risk scores. Methods and Results: We included participants from the Multi-Ethnic Study of Atherosclerosis (MESA). Read More

    In Vivo Genome Editing Restores Dystrophin Expression and Cardiac Function in Dystrophic Mice.
    Circ Res 2017 Aug 8. Epub 2017 Aug 8.
    Surgery, The Ohio State University Wexner Medical Center
    Rationale: Duchenne muscular dystrophy (DMD) is a severe inherited form of muscular dystrophy caused by mutations in the reading frame of the dystrophin gene disrupting its protein expression. Dystrophic cardiomyopathy is a leading cause of death in DMD patients and currently no effective treatment exists to halt its progression. Recent advancement in genome editing technologies offers a promising therapeutic approach in restoring dystrophin protein expression. Read More

    Neutrophil Activation of Endothelial Cell-Expressed TRPM2 Mediates Transendothelial Neutrophil Migration and Vascular Injury.
    Circ Res 2017 Aug 8. Epub 2017 Aug 8.
    Pharmacology, University of Illinois College of Medicine
    Rationale: TRPM2 (Transient Receptor Potential Melastatin-2) expressed in endothelial cells (ECs) is a cation channel mediating Ca(2+) entry in response to intracellular generation of adenosine diphosphoribose (ADPR), the TRPM2 ligand. Objective: Because polymorphonuclear leukocytes (PMN) interaction with endothelial cells (ECs) generates ROS, we addressed the possible role of TRPM2 expressed in ECs in the mechanism of transendothelial migration of PMNs. Methods and Results: We observed defective PMN transmigration in response to LPS challenge in adult mice in which the EC expressed TRPM2 is conditionally deleted (Trpm2(iΔEC) ). Read More

    TLR2 Plays a Key Role in Platelet Hyperreactivity and Accelerated Thrombosis Associated with Hyperlipidemia.
    Circ Res 2017 Aug 3. Epub 2017 Aug 3.
    Molecular Cardiology, Cleveland Clinic
    Rationale: Platelet hyperreactivity, which is common in many pathological conditions, is associated with increased atherothrombotic risk. The mechanisms leading to platelet hyperreactivity are complex and not yet fully understood. Objective: Platelet hyperreactivity and accelerated thrombosis, specifically in dyslipidemia, have been mechanistically linked to accumulation in the circulation of a specific group of oxidized phospholipids (oxPCCD36) that are ligands for the platelet pattern-recognition receptor CD36. Read More

    Brain-Heart Interaction: Cardiac Complications After Stroke.
    Circ Res 2017 Aug;121(4):451-468
    From the Gerontology and Neurological Institute, Tianjin Medical University General Hospital, China (Z.C., T.Y., J.C.); Department of Neurology, Henry Ford Hospital, Detroit, MI (P.V., D.S., M.C., J.C.); and Department of Physics, Oakland University, Rochester, MI (M.C.).
    Neurocardiology is an emerging specialty that addresses the interaction between the brain and the heart, that is, the effects of cardiac injury on the brain and the effects of brain injury on the heart. This review article focuses on cardiac dysfunction in the setting of stroke such as ischemic stroke, brain hemorrhage, and subarachnoid hemorrhage. The majority of post-stroke deaths are attributed to neurological damage, and cardiovascular complications are the second leading cause of post-stroke mortality. Read More

    A Unique Case of Stroke and Upper Limb Paralysis in a Mid-18th Century Natural Mummy.
    Circ Res 2017 Aug;121(4):338-340
    From the Institute of Evolutionary Medicine, University of Zurich, Switzerland (F.M.G., M.E.H., F.J.R.); Department of Archaeology, School of Humanities and Creative Art, Flinders University, Adelaide, Australia (M.E.H.); and School of Medical History, Medical and Dental Association of the Province of Rimini, Italy (S.D.C.).

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