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Liu D, Yang W. The effect of oscillation depolymerization on ethylenediaminetetraacetic acid-dependent platelet aggregation samples: A cross-over study. Int J Lab Hematol 2024; 46:481-487. [PMID: 38323755 DOI: 10.1111/ijlh.14246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 01/18/2024] [Indexed: 02/08/2024]
Abstract
INTRODUCTION Ethylenediaminetetraacetic acid (EDTA)-dependent platelet aggregation (PA) can cause medical errors. Currently, there is no reliable method for completely solving this problem. This study aims to solve this problem that has plagued clinical practice for many years by using oscillation method. METHODS Sixty-one EDTA-PA samples were collected, divided, and disaggregated using the oscillation method at various times and speeds. The samples were analyzed using routine blood tests and blood smears. RESULTS Platelet counts (PLT) were increased significantly after oscillation. PLT in the 3000 rpm for 0.5 min group was significantly higher than that in the 500 rpm for 0.5 min group (p < 0. 01). After 3000 rpm oscillation, the PLT gradually increased with time, while compared with the 10-min group, the PLT in the 13-min group showed no significant differences. The effective disaggregation rates in the EDTA-PA samples using the oscillation method and sodium citrate anticoagulant were 96.72% and 65.57%, respectively. There were no significant changes in white blood cell (WBC) or red blood cell (RBC) counts or morphology after the use of the oscillation method. CONCLUSION The oscillation method effectively depolymerized EDTA-PA without adverse effects on WBC and RBC. The implementation of this technique promises to resolve the issue of EDTA-PA.
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Affiliation(s)
- Dan Liu
- Department of Laboratory Diagnostics, First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, People's Republic of China
| | - Wei Yang
- Department of Laboratory Diagnostics, First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, People's Republic of China
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2
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Lardinois B, Favresse J, Chatelain B, Lippi G, Mullier F. Pseudothrombocytopenia-A Review on Causes, Occurrence and Clinical Implications. J Clin Med 2021; 10:594. [PMID: 33557431 PMCID: PMC7915523 DOI: 10.3390/jcm10040594] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 02/06/2023] Open
Abstract
Pseudothrombocytopenia (PTCP), a relative common finding in clinical laboratories, can lead to diagnostic errors, overtreatment, and further (even invasive) unnecessary testing. Clinical consequences with potential life-threatening events (e.g., unnecessary platelet transfusion, inappropriate treatment including splenectomy or corticosteroids) are still observed when PTCP is not readily detected. The phenomenon is even more complex when occurring with different anticoagulants. In this review we present a case of multi-anticoagulant PTCP, where we studied different parameters including temperature, amikacin supplementation, measurement methods, and type of anticoagulant. Prevalence, clinical risk factors, pre-analytical and analytical factors, along with clinical implications, will be discussed. The detection of an anticoagulant-dependent PTCP does not necessarily imply the presence of specific disorders. Conversely, the incidence of PTCP seems higher in patients receiving low molecular weight heparin, during hospitalization, or in men aged 50 years or older. New analytical technologies, such as fluorescence or optical platelet counting, will be soon overturning traditional algorithms and represent valuable diagnostic aids. A practical laboratory approach, based on current knowledge of PTCP, is finally proposed for overcoming spuriously low platelet counts.
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Affiliation(s)
- Benjamin Lardinois
- Namur Thrombosis and Hemostasis Center (NTHC), CHU UCL Namur, Université Catholique de Louvain, 5530 Yvoir, Belgium; (B.L.); (J.F.); (B.C.)
| | - Julien Favresse
- Namur Thrombosis and Hemostasis Center (NTHC), CHU UCL Namur, Université Catholique de Louvain, 5530 Yvoir, Belgium; (B.L.); (J.F.); (B.C.)
| | - Bernard Chatelain
- Namur Thrombosis and Hemostasis Center (NTHC), CHU UCL Namur, Université Catholique de Louvain, 5530 Yvoir, Belgium; (B.L.); (J.F.); (B.C.)
| | - Giuseppe Lippi
- Section of Clinical Biochemistry, University of Verona, 37134 Verona, Italy;
| | - François Mullier
- Namur Thrombosis and Hemostasis Center (NTHC), CHU UCL Namur, Université Catholique de Louvain, 5530 Yvoir, Belgium; (B.L.); (J.F.); (B.C.)
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Baccini V, Geneviève F, Jacqmin H, Chatelain B, Girard S, Wuilleme S, Vedrenne A, Guiheneuf E, Toussaint-Hacquard M, Everaere F, Soulard M, Lesesve JF, Bardet V. Platelet Counting: Ugly Traps and Good Advice. Proposals from the French-Speaking Cellular Hematology Group (GFHC). J Clin Med 2020; 9:jcm9030808. [PMID: 32188124 PMCID: PMC7141345 DOI: 10.3390/jcm9030808] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/12/2020] [Accepted: 03/12/2020] [Indexed: 12/25/2022] Open
Abstract
Despite the ongoing development of automated hematology analyzers to optimize complete blood count results, platelet count still suffers from pre-analytical or analytical pitfalls, including EDTA-induced pseudothrombocytopenia. Although most of these interferences are widely known, laboratory practices remain highly heterogeneous. In order to harmonize and standardize cellular hematology practices, the French-speaking Cellular Hematology Group (GFHC) wants to focus on interferences that could affect the platelet count and to detail the verification steps with minimal recommendations, taking into account the different technologies employed nowadays. The conclusions of the GFHC presented here met with a "strong professional agreement" and are explained with their rationale to define the course of actions, in case thrombocytopenia or thrombocytosis is detected. They are proposed as minimum recommendations to be used by each specialist in laboratory medicine who remains free to use more restrictive guidelines based on the patient’s condition.
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Affiliation(s)
- Véronique Baccini
- Laboratoire d’hématologie, CHU de la Guadeloupe, INSERM UMR S_1134, 97159 Pointe-à-Pitre, France
- Correspondence:
| | - Franck Geneviève
- Fédération Hospitalo-Universitaire ‘Grand Ouest Against Leukemia’ (FHU GOAL), 49033 Angers, France;
| | - Hugues Jacqmin
- Université Catholique de Louvain, CHU UCL Namur, Laboratoire d’hématologie, Namur Thrombosis and Hemostasis Center, 5530 Yvoir, Belgium; (H.J.); (B.C.)
| | - Bernard Chatelain
- Université Catholique de Louvain, CHU UCL Namur, Laboratoire d’hématologie, Namur Thrombosis and Hemostasis Center, 5530 Yvoir, Belgium; (H.J.); (B.C.)
| | - Sandrine Girard
- Hospices Civils de Lyon, Centre de biologie et pathologie Est, Service d’hématologie biologique, 69500 Bron, France;
| | - Soraya Wuilleme
- Laboratoire d’Hématologie, Institut de Biologie, CHU de Nantes; 44093 Nantes CEDEX, France;
| | - Aurélie Vedrenne
- Service de biologie clinique, Hôpital Foch, 92150 Suresnes, France;
| | - Eric Guiheneuf
- Service d’Hématologie Biologique, CHU Amiens-Picardie, 80054 Amiens CEDEX, France;
| | | | | | - Michel Soulard
- Plateau technique d’hématologie, Laboratoire Biogroup, 92300 Levallois-Perret, France;
| | | | - Valérie Bardet
- Service d’Hématologie-Immunologie-Transfusion, CHU Ambroise Paré, INSERM UMR 1184, AP-HP, Université Paris Saclay, 92100 Boulogne-Billancourt, France;
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4
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Vallet-Courbin A, Larivière M, Hocquellet A, Hemadou A, Parimala SN, Laroche-Traineau J, Santarelli X, Clofent-Sanchez G, Jacobin-Valat MJ, Noubhani A. A Recombinant Human Anti-Platelet scFv Antibody Produced in Pichia pastoris for Atheroma Targeting. PLoS One 2017; 12:e0170305. [PMID: 28125612 PMCID: PMC5268420 DOI: 10.1371/journal.pone.0170305] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 01/03/2017] [Indexed: 11/18/2022] Open
Abstract
Cells of the innate and adaptive immune system are key factors in the progression of atherosclerotic plaque, leading to plaque instability and rupture, potentially resulting in acute atherothrombotic events such as coronary artery disease, cerebrovascular disease and peripheral arterial disease. Here, we describe the cloning, expression, purification, and immunoreactivity assessment of a recombinant single-chain variable fragment (scFv) derived from a human anti-αIIbβ3 antibody (HuAb) selected to target atheromatous lesions for the presence of platelets. Indeed, platelets within atheroma plaques have been shown to play a role in inflammation, in platelet-leucocyte aggregates and in thrombi formation and might thus be considered relevant biomarkers of atherosclerotic progression. The DNA sequence that encodes the anti-αIIbβ3 TEG4 scFv previously obtained from a phage-display selection on activated platelets, was inserted into the eukaryote vector (pPICZαA) in fusion with a tag sequence encoding 2 cysteines useable for specific probes grafting experiments. The recombinant protein was expressed at high yields in Pichia pastoris (30 mg/L culture). The advantage of P. pastoris as an expression system is the production and secretion of recombinant proteins in the supernatant, ruling out the difficulties encountered when scFv are produced in the cytoplasm of bacteria (low yield, low solubility and reduced affinity). The improved conditions allowed for the recovery of highly purified and biologically active scFv fragments ready to be grafted in a site-directed way to nanoparticles for the imaging of atherosclerotic plaques involving inflammatory processes and thus at high risk of instability.
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Affiliation(s)
| | - Mélusine Larivière
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | | | - Audrey Hemadou
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | | | - Jeanny Laroche-Traineau
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | | | - Gisèle Clofent-Sanchez
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
| | - Marie-Josée Jacobin-Valat
- Centre de Résonance Magnétique de Systèmes Biologiques, Centre Nationale de Recherche Scientifique et Université de Bordeaux, Bordeaux, France
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5
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Xu W, Chen B, Chen Y. Ethylenediaminetetraacetate-dependent pseudothrombocytopenia accompanied by morphological changes. Int J Hematol 2014; 99:357-8. [PMID: 24584874 DOI: 10.1007/s12185-014-1558-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 02/20/2014] [Accepted: 02/20/2014] [Indexed: 11/25/2022]
Affiliation(s)
- Weiyi Xu
- Department of Clinical Laboratory, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, China
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Development of a Platform of Antibody-Presenting Liposomes. Biointerphases 2012; 7:11. [DOI: 10.1007/s13758-011-0011-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Accepted: 12/07/2011] [Indexed: 10/14/2022] Open
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Hamill KJ, Kligys K, Hopkinson SB, Jones JCR. Laminin deposition in the extracellular matrix: a complex picture emerges. J Cell Sci 2010; 122:4409-17. [PMID: 19955338 DOI: 10.1242/jcs.041095] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Laminins are structural components of basement membranes. In addition, they are key extracellular-matrix regulators of cell adhesion, migration, differentiation and proliferation. This Commentary focuses on a relatively understudied aspect of laminin biology: how is laminin deposited into the extracellular matrix? This topic has fascinated researchers for some time, particularly considering the diversity of patterns of laminin that can be visualized in the matrix of cultured cells. We discuss current ideas of how laminin matrices are assembled, the role of matrix receptors in this process and how laminin-associated proteins modulate matrix deposition. We speculate on the role of signaling pathways that are involved in laminin-matrix deposition and on how laminin patterns might play an important role in specifying cell behaviors, especially directed migration. We conclude with a description of new developments in the way that laminin deposition is being studied, including the use of tagged laminin subunits that should allow the visualization of laminin-matrix deposition and assembly by living cells.
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Affiliation(s)
- Kevin J Hamill
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, IL 60611, USA
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Zandecki M, Genevieve F, Gerard J, Godon A. Spurious counts and spurious results on haematology analysers: a review. Part I: platelets. ACTA ACUST UNITED AC 2007; 29:4-20. [PMID: 17224004 DOI: 10.1111/j.1365-2257.2006.00870.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The widespread use of haematology analysers (HA) has led to a major improvement of cellular haematology, because of quick and accurate results found in most instances. However, in several situations, spurious results are observed. Inadequate blood samples, situations induced by the anticoagulant(s) used, peculiar changes related to the pathology in the patient, and technical considerations about performances of the various HA must be considered. Spurious thrombocytopenia occurs in several circumstances related to the presence of ethylenediamine tetra-acetic acid (EDTA) used as the anticoagulant. Mechanism of EDTA-dependent platelet (PLT) agglutination is related to circulating (auto)antibodies directed against normally hidden epitope(s) in the glycoprotein alpha IIb/beta IIIa complex from PLT membrane exposed only in the presence of EDTA. Other spuriously low PLT counts may be related to EDTA, including PLT rosetting around white blood cells (WBC; satellitism) and PLT-WBC aggregates, but mechanisms responsible for those latter phenomena are less well known. Spurious increase of PLT count may be related to several situations, including fragmented red blood cells, cytoplasmic fragments of nucleated cells, cryoglobulins, bacteria or fungi, and lipids. Flags generated in several of these situations alert the operator on possible abnormal findings and may identify the problem. Analysing only PLT parameters is not sufficient: in many situations the WBC differential scattergram is of crucial help for flagging. Flags generated depend on the software version on the HA used, the performance in detecting the same anomalies may differ according to which analyser is used, even those from the same manufacturer. Operators must be aware of the characteristics of their analyser and be able to recognize and circumvent anomalous results.
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Affiliation(s)
- M Zandecki
- Haematology Laboratory, University Hospital of Angers, Angers, France.
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9
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Robert R, Clofent-Sanchez G, Hocquellet A, Jacobin-Valat MJ, Daret D, Noubhani AM, Santarelli X. Large-scale production, bacterial localization assessment and immobilized metal affinity chromatography purification of a human single-chain Fv antibody against alphaIIb-beta3 integrin. Int J Biol Macromol 2006; 39:51-9. [PMID: 16620955 DOI: 10.1016/j.ijbiomac.2006.01.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2005] [Revised: 01/18/2006] [Accepted: 01/18/2006] [Indexed: 11/28/2022]
Abstract
Our objective was to investigate the Escherichia coli localization (such as supernatant, cytoplasm and inclusion bodies) of an anti-alphaIIb-beta3 (alphaIIbbeta3) scFv fragment referred to as scFv[EBB3] produced in batch fermentation. Immobilized metal affinity chromatography (IMAC) purification was performed on supernatant using expanded bed absorbed technology (EBA) and on sonicated cells in native conditions over an immobilized copper-ion affinity column. Inclusion bodies were solubilized before IMAC purification and the refolding procedure was performed on the column. The majority of scFv[EBB3] were present as inclusion bodies (55%), whereas 36% were found in the cytoplasm and only 9% secreted in the supernatant. The scFv activity was assessed by enzyme-linked immunosorbent assay (ELISA), flow cytometry and immunohistochemistry analyses performed on a thrombus induced in vivo on an atherosclerotic rabbit model.
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Affiliation(s)
- R Robert
- CNRS UMR 5536, RMSB Résonance Magnétique des Systèmes Biologiques, Université Victor Ségalen, Bât. 4a, 146 rue Léo Saignat, 33076 Bordeaux, France.
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10
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Robert R, Noubhani AM, Jacobin MJ, Santarelli X, Clofent-Sanchez G. Improvement in production and purification bioprocesses of bacterially expressed anti-alphaIIbbeta3 human single-chain FV antibodies. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 818:43-51. [PMID: 15722043 DOI: 10.1016/j.jchromb.2004.10.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Accepted: 10/07/2004] [Indexed: 11/26/2022]
Abstract
Production of anti-alphaIIbbeta3 (anti-alphaIIbbeta3)-binding single-chain FV (scFv) fragments obtained from combinatorial libraries of IgG human antibodies is of broad interest for imaging and treatment of acute coronary syndromes. The objective of our work was to design an optimized production of one selected anti-alphaIIbbeta3-binding scFv fragment for subsequent in vivo animal studies. Fed-batch fermentation was initiated with 2TY media supplemented with 0.1 M glucose. This growing batch culture was used as a starting point for further fed-batch induction, in which a media without glucose containing 1 mM IPTG and 0.4 M saccharose was continuously added. Subsequent purification was performed on the whole cell extract in native conditions over an immobilized copper-ion affinity column. The improved conditions allowed the recovery of 5 mg of highly purified scFv fragments as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The bioactivity of the scFv fragments was further monitored by ELISA, cytometric and immunohistochemical methods.
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Affiliation(s)
- R Robert
- CNRS UMR 5536 Résonance Magnétique des Systèmes Biologiques (RMSB), Université Victor Segalen Bordeaux 2, Bât. 4a, 146 rue Léo Saignat, 33076 Bordeaux Cedex, France
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Jacobin MJ, Laroche-Traineau J, Little M, Keller A, Peter K, Welschof M, Nurden A, Clofent-Sanchez G. Human IgG monoclonal anti-alpha(IIb)beta(3)-binding fragments derived from immunized donors using phage display. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:2035-45. [PMID: 11823541 DOI: 10.4049/jimmunol.168.4.2035] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Previous studies of the immune response in polytransfused Glanzmann thrombasthenia (GT) patients and in autoimmune thrombocytopenic purpura (AITP) have relied on serum analysis and have shown the frequent development of Abs directed against the alpha(IIb)beta(3) integrin. However, little is known about the molecular diversity of the humoral immune response to alpha(IIb)beta(3) due to the paucity of mAbs issuing from these pathologies. We have isolated human IgG anti-alpha(IIb)beta(3) binding fragments using combinatorial libraries of single-chain IgG created from the B cells of a GT and an AITP patient, both with serum Abs. Ab screening was performed using activated platelets or activated alpha(IIb)beta(3)-expressing Chinese hamster ovary cells. Sequencing of selected phage Abs showed that a broad selection of genes from virtually all V gene families had been used, indicating the diversity of the immune response. About one-half of the V(H) and V(L) segments of our IgG anti-alpha(IIb)beta(3) fragments displayed extensive hypermutations in the complementarity-determining region, supporting the idea that an Ag-driven immune response was occurring in both patients. The H chain complementarity-determining region 3 analysis of phage Abs revealed motifs other than the well-known RGD and KQAGDV integrin-binding sequences. To our knowledge, our study is the first to illustrate multiple human IgG anti-alpha(IIb)beta(3) reactivities and structural variations linked to the anti-platelet human immune response. Human alpha(IIb)beta(3) Abs preferentially directed against the activated form of the integrin were further characterized because platelet alpha(IIb)beta(3) inhibitors are potential therapeutic reagents for treating acute coronary syndromes. Currently available alpha(IIb)beta(3) antagonists do not specifically recognize the activated form of the integrin.
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Affiliation(s)
- Marie-Josée Jacobin
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5533, Hopital Cardiologique, Pessac, France
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