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  1. Artikel: Integrating copy number data of 64 iAMP21 BCP-ALL patients narrows the common region of amplification to 1.57 Mb.

    Hormann, Femke M / Hoogkamer, Alex Q / Boeree, Aurélie / Sonneveld, Edwin / Escherich, Gabriele / den Boer, Monique L / Boer, Judith M

    Frontiers in oncology

    2023  Band 13, Seite(n) 1128560

    Abstract: Background and purpose: Intrachromosomal amplification of chromosome 21 (iAMP21) is a rare subtype of B-cell precursor acute lymphoblastic leukaemia (BCP-ALL). It is unknown how iAMP21 contributes to leukaemia. The currently known commonly amplified ... ...

    Abstract Background and purpose: Intrachromosomal amplification of chromosome 21 (iAMP21) is a rare subtype of B-cell precursor acute lymphoblastic leukaemia (BCP-ALL). It is unknown how iAMP21 contributes to leukaemia. The currently known commonly amplified region is 5.1 Mb.
    Methods: We aimed to narrow down the common region of amplification by using high resolution techniques. Array comparative genomic hybridization (aCGH) was used to determine copy number aberrations, Affymetrix U133 Plus2 expression arrays were used to determine gene expression. Genome-wide expression correlations were evaluated using Globaltest.
    Results: We narrowed down the common region of amplification by combining copy number data from 12 iAMP21 cases with 52 cases from literature. The combined common region of amplification was 1.57 Mb, located from 36.07 to 37.64 Mb (GRCh38). This region is located telomeric from, but not including,
    Discussion: The more precise definition of the common region of amplification could be beneficial in the diagnosis of iAMP21 based on copy number analysis from DNA sequencing or arrays as well as stimulate functional research into the role of the included genes in iAMP21 biology.
    Sprache Englisch
    Erscheinungsdatum 2023-02-23
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2649216-7
    ISSN 2234-943X
    ISSN 2234-943X
    DOI 10.3389/fonc.2023.1128560
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Tyrosine kinase inhibitor resistance in de novo BCR::ABL1-positive BCP-ALL beyond kinase domain mutations.

    van Outersterp, Inge / Boer, Judith M / van de Ven, Cesca / Reichert, Caitlin E J / Boeree, Aurelie / Kruisinga, Brian / de Groot-Kruseman, Hester A / Escherich, Gabriele / Sijs-Szabo, Aniko / Rijneveld, Anita W / den Boer, Monique L

    Blood advances

    2024  Band 8, Heft 8, Seite(n) 1835–1845

    Abstract: Abstract: A better understanding of ABL1 kinase domain mutation-independent causes of tyrosine kinase inhibitor (TKI) resistance is needed for BCR::ABL1-positive B-cell precursor acute lymphoblastic leukemia (BCP-ALL). Although TKIs have dramatically ... ...

    Abstract Abstract: A better understanding of ABL1 kinase domain mutation-independent causes of tyrosine kinase inhibitor (TKI) resistance is needed for BCR::ABL1-positive B-cell precursor acute lymphoblastic leukemia (BCP-ALL). Although TKIs have dramatically improved outcomes, a subset of patients still experiences relapsed or refractory disease. We aimed to identify potential biomarkers of intrinsic TKI resistance at diagnosis in samples from 32 pediatric and 19 adult patients with BCR::ABL1-positive BCP-ALL. Reduced ex vivo imatinib sensitivity was observed in cells derived from newly diagnosed patients who relapsed after combined TKI and chemotherapy treatment compared with cells derived from patients who remained in continuous complete remission. We observed that ex vivo imatinib resistance was inversely correlated with the amount of (phosphorylated) BCR::ABL1/ABL1 protein present in samples that were taken at diagnosis without prior TKI exposure. This suggests an intrinsic cause of TKI resistance that is independent of functional BCR::ABL1 signaling. Simultaneous deletions of IKZF1 and CDKN2A/B and/or PAX5 (IKZF1plus), as well as deletions of PAX5 alone, were related to ex vivo imatinib resistance. In addition, somatic lesions involving ZEB2, SETD2, SH2B3, and CRLF2 were associated with reduced ex vivo imatinib sensitivity. Our data suggest that the poor prognostic value of IKZF1(plus) deletions is linked to intrinsic mechanisms of TKI resistance other than ABL1 kinase domain mutations in newly diagnosed pediatric and adult BCR::ABL1-positive BCP-ALL.
    Mesh-Begriff(e) Adult ; Humans ; Child ; Imatinib Mesylate/pharmacology ; Imatinib Mesylate/therapeutic use ; Fusion Proteins, bcr-abl/metabolism ; Tyrosine Kinase Inhibitors ; Protein Kinase Inhibitors/pharmacology ; Protein Kinase Inhibitors/therapeutic use ; Mutation ; Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/diagnosis ; Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/drug therapy ; Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/genetics
    Chemische Substanzen Imatinib Mesylate (8A1O1M485B) ; Fusion Proteins, bcr-abl (EC 2.7.10.2) ; Tyrosine Kinase Inhibitors ; Protein Kinase Inhibitors
    Sprache Englisch
    Erscheinungsdatum 2024-02-21
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2915908-8
    ISSN 2473-9537 ; 2473-9529
    ISSN (online) 2473-9537
    ISSN 2473-9529
    DOI 10.1182/bloodadvances.2023012162
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Ibrutinib is not an effective drug in primografts of TCF3-PBX1.

    van de Ven, Cesca / Boeree, Aurélie / Stalpers, Femke / Zwaan, C Michel / Den Boer, Monique L

    Translational oncology

    2020  Band 13, Heft 10, Seite(n) 100817

    Abstract: Aim: The Bruton's tyrosine kinase (BTK) inhibitor Ibrutinib (PCI-32765) is effective in patients with multiple myeloma, non-Hodgkin lymphoma and chronic lymphoblastic leukemia. We previously showed that primary cells of children with TCF3-PBX1 positive ... ...

    Abstract Aim: The Bruton's tyrosine kinase (BTK) inhibitor Ibrutinib (PCI-32765) is effective in patients with multiple myeloma, non-Hodgkin lymphoma and chronic lymphoblastic leukemia. We previously showed that primary cells of children with TCF3-PBX1 positive B-cell precursor acute lymphoblastic leukemia (BCP-ALL) express BTK and are sensitive to ibrutinib in vitro. However, preclinical studies in mice are lacking that justify clinical implementation.
    Methods: Immunocompromised NSG mice were engrafted with a luciferase-positive TCF3-PBX1 leukemic cell line or primary leukemic cells and treated with ibrutinib or placebo. Additionally, primary cells were exposed in vitro to 4 main induction drugs as monotherapy and in combination with ibrutinib.
    Results: Treatment with ibrutinib of mice engrafted with a TCF3-PBX1 cell line, TCF3-PBX1 positive or TCF3-PBX1 negative primary leukemic cells did not result in prolonged life span compared to placebo treated mice. In vitro sensitivity to ibrutinib was unaltered in leukemic cells obtained from engrafted mice compared to the original material. However, ibrutinib treatment did not affect leukemic cell viability and tumor outgrowth, nor could lymphocytosis be detected. Ibrutinib was biologically active, since hCD19
    Conclusions: We conclude that ibrutinib is not the precision medicine of choice for TCF3-PBX1 positive BCP-ALL.
    Sprache Englisch
    Erscheinungsdatum 2020-06-18
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2443840-6
    ISSN 1936-5233 ; 1936-5233 ; 1944-7124
    ISSN (online) 1936-5233
    ISSN 1936-5233 ; 1944-7124
    DOI 10.1016/j.tranon.2020.100817
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Tyrosine kinase inhibitor response of ABL-class acute lymphoblastic leukemia: the role of kinase type and SH3 domain.

    van Outersterp, Inge / Tasian, Sarah K / Reichert, Caitlin E J / Boeree, Aurélie / de Groot-Kruseman, Hester A / Escherich, Gabriele / Boer, Judith M / den Boer, Monique L

    Blood

    2023  Band 143, Heft 21, Seite(n) 2178–2189

    Abstract: Abstract: Acute lymphoblastic leukemia (ALL) with fusions of ABL-class tyrosine kinase genes other than BCR::ABL1 occurs in ∼3% of children with ALL. The tyrosine kinase genes involved in this BCR::ABL1-like (Ph-like) subtype include ABL1, PDGFRB, ABL2, ...

    Abstract Abstract: Acute lymphoblastic leukemia (ALL) with fusions of ABL-class tyrosine kinase genes other than BCR::ABL1 occurs in ∼3% of children with ALL. The tyrosine kinase genes involved in this BCR::ABL1-like (Ph-like) subtype include ABL1, PDGFRB, ABL2, and CSF1R, each of which has up to 10 described partner genes. ABL-class ALL resembles BCR::ABL1-positive ALL with a similar gene expression profile, poor response to chemotherapy, and sensitivity to tyrosine kinase inhibitors (TKIs). There is a lack of comprehensive data regarding TKI sensitivity in the heterogeneous group of ABL-class ALL. We observed variability in TKI sensitivity within and among each ABL-class tyrosine kinase gene subgroup. We showed that ALL samples with fusions for any of the 4 tyrosine kinase genes were relatively sensitive to imatinib. In contrast, the PDGFRB-fused ALL samples were less sensitive to dasatinib and bosutinib. Variation in ex vivo TKI response within the subset of samples with the same ABL-class tyrosine kinase gene was not associated with the ALL immunophenotype, 5' fusion partner, presence or absence of Src-homology-2/3 domains, or deletions of IKZF1, PAX5, or CDKN2A/B. In conclusion, the tyrosine kinase gene involved in ABL-class ALL is the main determinant of TKI sensitivity and relevant for specific TKI selection.
    Mesh-Begriff(e) Humans ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/pathology ; Protein Kinase Inhibitors/therapeutic use ; Protein Kinase Inhibitors/pharmacology ; Child ; Proto-Oncogene Proteins c-abl/genetics ; Proto-Oncogene Proteins c-abl/metabolism ; src Homology Domains ; Adolescent ; Child, Preschool ; Female ; Male ; Imatinib Mesylate/therapeutic use ; Imatinib Mesylate/pharmacology ; Receptor, Platelet-Derived Growth Factor beta/genetics ; Receptor, Platelet-Derived Growth Factor beta/metabolism ; Dasatinib/therapeutic use ; Dasatinib/pharmacology ; Oncogene Proteins, Fusion/genetics ; Tyrosine Kinase Inhibitors
    Chemische Substanzen Protein Kinase Inhibitors ; Proto-Oncogene Proteins c-abl (EC 2.7.10.2) ; ABL1 protein, human (EC 2.7.10.2) ; Imatinib Mesylate (8A1O1M485B) ; Receptor, Platelet-Derived Growth Factor beta (EC 2.7.10.1) ; Dasatinib (RBZ1571X5H) ; Oncogene Proteins, Fusion ; Tyrosine Kinase Inhibitors
    Sprache Englisch
    Erscheinungsdatum 2023-11-09
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 80069-7
    ISSN 1528-0020 ; 0006-4971
    ISSN (online) 1528-0020
    ISSN 0006-4971
    DOI 10.1182/blood.2023023120
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Characterization of a novel

    Van Outersterp, Inge / Hormann, Femke M / Hoogkamer, Alex Q / Boeree, Aurélie / Van den Broek, Stijn A / Den Boer, Monique L / Boer, Judith M

    Haematologica

    2023  Band 108, Heft 10, Seite(n) 2859–2864

    Mesh-Begriff(e) Humans ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics ; Transcription Factors ; Cell Line ; Oncogene Proteins, Fusion/genetics ; Oncogene Proteins, Fusion/metabolism ; MEF2 Transcription Factors/genetics ; MEF2 Transcription Factors/metabolism
    Chemische Substanzen Transcription Factors ; Oncogene Proteins, Fusion ; BCL9 protein, human ; MEF2D protein, human ; MEF2 Transcription Factors
    Sprache Englisch
    Erscheinungsdatum 2023-10-01
    Erscheinungsland Italy
    Dokumenttyp Letter
    ZDB-ID 2333-4
    ISSN 1592-8721 ; 0017-6567 ; 0390-6078
    ISSN (online) 1592-8721
    ISSN 0017-6567 ; 0390-6078
    DOI 10.3324/haematol.2022.281712
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Copy number alterations in B-cell development genes, drug resistance, and clinical outcome in pediatric B-cell precursor acute lymphoblastic leukemia.

    Steeghs, Elisabeth M P / Boer, Judith M / Hoogkamer, Alex Q / Boeree, Aurélie / de Haas, Valerie / de Groot-Kruseman, Hester A / Horstmann, Martin A / Escherich, Gabriele / Pieters, Rob / den Boer, Monique L

    Scientific reports

    2019  Band 9, Heft 1, Seite(n) 4634

    Abstract: Pediatric B-cell precursor acute lymphoblastic leukemia (BCP-ALL) is associated with a high frequency of copy number alterations (CNAs) in IKZF1, EBF1, PAX5, CDKN2A/B, RB1, BTG1, ETV6, and/or the PAR1 region (henceforth: B-cell development genes). We ... ...

    Abstract Pediatric B-cell precursor acute lymphoblastic leukemia (BCP-ALL) is associated with a high frequency of copy number alterations (CNAs) in IKZF1, EBF1, PAX5, CDKN2A/B, RB1, BTG1, ETV6, and/or the PAR1 region (henceforth: B-cell development genes). We aimed to gain insight in the association between CNAs in these genes, clinical outcome parameters, and cellular drug resistance. 71% of newly diagnosed pediatric BCP-ALL cases harbored one or more CNAs in these B-cell development genes. The distribution and clinical relevance of these CNAs was highly subtype-dependent. In the DCOG-ALL10 cohort, only loss of IKZF1 associated as single marker with unfavorable outcome parameters and cellular drug resistance. Prednisolone resistance was observed in IKZF1-deleted primary high hyperdiploid cells (~1500-fold), while thiopurine resistance was detected in IKZF1-deleted primary BCR-ABL1-like and non-BCR-ABL1-like B-other cells (~2.7-fold). The previously described risk stratification classifiers, i.e. IKZF1
    Mesh-Begriff(e) Adolescent ; B-Lymphocytes/metabolism ; Child ; Child, Preschool ; Cohort Studies ; DNA Copy Number Variations/genetics ; Drug Resistance ; Female ; Gene Dosage ; Genes, p16/physiology ; Humans ; Ikaros Transcription Factor/genetics ; Male ; Neoplasm Proteins/genetics ; PAX5 Transcription Factor/genetics ; Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/genetics ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics ; Prognosis ; Proto-Oncogene Proteins c-ets/genetics ; Repressor Proteins/genetics ; Retinoblastoma Binding Proteins/genetics ; Trans-Activators/genetics ; Ubiquitin-Protein Ligases/genetics ; ETS Translocation Variant 6 Protein
    Chemische Substanzen EBF1 protein, human ; IKZF1 protein, human ; Neoplasm Proteins ; PAX5 Transcription Factor ; PAX5 protein, human ; Proto-Oncogene Proteins c-ets ; RB1 protein, human ; Repressor Proteins ; Retinoblastoma Binding Proteins ; Trans-Activators ; BTG1 protein, human (146835-72-5) ; Ikaros Transcription Factor (148971-36-2) ; Ubiquitin-Protein Ligases (EC 2.3.2.27)
    Sprache Englisch
    Erscheinungsdatum 2019-03-15
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-41078-4
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: NUTM1

    Hormann, Femke M / Hoogkamer, Alex Q / Beverloo, H Berna / Boeree, Aurélie / Dingjan, Ilse / Wattel, Moniek M / Stam, Ronald W / Escherich, Gabriele / Pieters, Rob / den Boer, Monique L / Boer, Judith M

    Haematologica

    2019  Band 104, Heft 10, Seite(n) e455–e459

    Mesh-Begriff(e) Child ; Chromosome Banding ; Chromosomes, Human ; Female ; Gene Expression Regulation, Leukemic ; Humans ; Male ; Neoplasm Proteins/biosynthesis ; Neoplasm Proteins/genetics ; Nuclear Proteins/biosynthesis ; Nuclear Proteins/genetics ; Oncogene Proteins, Fusion/biosynthesis ; Oncogene Proteins, Fusion/genetics ; Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/genetics ; Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/metabolism ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/metabolism ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/pathology
    Chemische Substanzen NUTM1 protein, human ; Neoplasm Proteins ; Nuclear Proteins ; Oncogene Proteins, Fusion
    Sprache Englisch
    Erscheinungsdatum 2019-03-14
    Erscheinungsland Italy
    Dokumenttyp Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 2333-4
    ISSN 1592-8721 ; 0017-6567 ; 0390-6078
    ISSN (online) 1592-8721
    ISSN 0017-6567 ; 0390-6078
    DOI 10.3324/haematol.2018.206961
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: JAK2

    Steeghs, Elisabeth M P / Jerchel, Isabel S / de Goffau-Nobel, Willemieke / Hoogkamer, Alex Q / Boer, Judith M / Boeree, Aurélie / van de Ven, Cesca / Koudijs, Marco J / Besselink, Nicolle J M / de Groot-Kruseman, Hester A / Zwaan, Christian Michel / Horstmann, Martin A / Pieters, Rob / den Boer, Monique L

    Oncotarget

    2017  Band 8, Heft 52, Seite(n) 89923–89938

    Abstract: ... ...

    Abstract JAK2
    Sprache Englisch
    Erscheinungsdatum 2017-10-27
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2560162-3
    ISSN 1949-2553 ; 1949-2553
    ISSN (online) 1949-2553
    ISSN 1949-2553
    DOI 10.18632/oncotarget.21027
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Tyrosine kinase fusion genes in pediatric BCR-ABL1-like acute lymphoblastic leukemia.

    Boer, Judith M / Steeghs, Elisabeth M P / Marchante, João R M / Boeree, Aurélie / Beaudoin, James J / Beverloo, H Berna / Kuiper, Roland P / Escherich, Gabriele / van der Velden, Vincent H J / van der Schoot, C Ellen / de Groot-Kruseman, Hester A / Pieters, Rob / den Boer, Monique L

    Oncotarget

    2016  Band 8, Heft 3, Seite(n) 4618–4628

    Abstract: Approximately 15% of pediatric B cell precursor acute lymphoblastic leukemia (BCP-ALL) is characterized by gene expression similar to that of BCR-ABL1-positive disease and unfavorable prognosis. This BCR-ABL1-like subtype shows a high frequency of B-cell ...

    Abstract Approximately 15% of pediatric B cell precursor acute lymphoblastic leukemia (BCP-ALL) is characterized by gene expression similar to that of BCR-ABL1-positive disease and unfavorable prognosis. This BCR-ABL1-like subtype shows a high frequency of B-cell development gene aberrations and tyrosine kinase-activating lesions. To evaluate the clinical significance of tyrosine kinase gene fusions in children with BCP-ALL, we studied the frequency of recently identified tyrosine kinase fusions, associated genetic features, and prognosis in a representative Dutch/German cohort. We identified 14 tyrosine kinase fusions among 77 BCR-ABL1-like cases (18%) and none among 76 non-BCR-ABL1-like B-other cases. Novel exon fusions were identified for RCSD1-ABL2 and TERF2-JAK2. JAK2 mutation was mutually exclusive with tyrosine kinase fusions and only occurred in cases with high CRLF2 expression. The non/late response rate and levels of minimal residual disease in the fusion-positive BCR-ABL1-like group were higher than in the non-BCR-ABL1-like B-others (p<0.01), and also higher, albeit not statistically significant, compared with the fusion-negative BCR-ABL1-like group. The 8-year cumulative incidence of relapse in the fusion-positive BCR-ABL1-like group (35%) was comparable with that in the fusion-negative BCR-ABL1-like group (35%), and worse than in the non-BCR-ABL1-like B-other group (17%, p=0.07). IKZF1 deletions, predominantly other than the dominant-negative isoform and full deletion, co-occurred with tyrosine kinase fusions. This study shows that tyrosine kinase fusion-positive cases are a high-risk subtype of BCP-ALL, which warrants further studies with specific kinase inhibitors to improve outcome.
    Mesh-Begriff(e) Adolescent ; Cohort Studies ; Female ; Fusion Proteins, bcr-abl/genetics ; Gene Deletion ; Germany ; Humans ; Ikaros Transcription Factor/genetics ; Intracellular Signaling Peptides and Proteins/genetics ; Janus Kinase 2/genetics ; Male ; Mutation ; Netherlands ; Oligonucleotide Array Sequence Analysis ; Oncogene Proteins, Fusion/genetics ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics ; Protein-Tyrosine Kinases/genetics ; Telomeric Repeat Binding Protein 2/genetics ; Young Adult
    Chemische Substanzen BCR-ABL1 fusion protein, human ; IKZF1 protein, human ; Intracellular Signaling Peptides and Proteins ; Oncogene Proteins, Fusion ; RCSD1 protein, human ; TERF2 protein, human ; Telomeric Repeat Binding Protein 2 ; Ikaros Transcription Factor (148971-36-2) ; ARG tyrosine kinase (EC 2.7.1.-) ; Protein-Tyrosine Kinases (EC 2.7.10.1) ; Fusion Proteins, bcr-abl (EC 2.7.10.2) ; JAK2 protein, human (EC 2.7.10.2) ; Janus Kinase 2 (EC 2.7.10.2)
    Sprache Englisch
    Erscheinungsdatum 2016-11-28
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2560162-3
    ISSN 1949-2553 ; 1949-2553
    ISSN (online) 1949-2553
    ISSN 1949-2553
    DOI 10.18632/oncotarget.13492
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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