Geir E. Tjønnfjord

9.2k total citations · 1 hit paper
217 papers, 5.7k citations indexed

About

Geir E. Tjønnfjord is a scholar working on Hematology, Genetics and Immunology. According to data from OpenAlex, Geir E. Tjønnfjord has authored 217 papers receiving a total of 5.7k indexed citations (citations by other indexed papers that have themselves been cited), including 121 papers in Hematology, 86 papers in Genetics and 57 papers in Immunology. Recurrent topics in Geir E. Tjønnfjord's work include Chronic Lymphocytic Leukemia Research (67 papers), Lymphoma Diagnosis and Treatment (41 papers) and Hematopoietic Stem Cell Transplantation (40 papers). Geir E. Tjønnfjord is often cited by papers focused on Chronic Lymphocytic Leukemia Research (67 papers), Lymphoma Diagnosis and Treatment (41 papers) and Hematopoietic Stem Cell Transplantation (40 papers). Geir E. Tjønnfjord collaborates with scholars based in Norway, Sweden and United States. Geir E. Tjønnfjord's co-authors include Pål André Holme, Sigbjørn Berentsen, Ludvig A. Munthe, Fridtjof Lund‐Johansen, Maria Therese Ahlén, Anne Hege Aamodt, Markus Wiedmann, Thor Håkon Skattør, Ingvild Hausberg Sørvoll and Nina Haagenrud Schultz and has published in prestigious journals such as New England Journal of Medicine, The Lancet and The Journal of Experimental Medicine.

In The Last Decade

Geir E. Tjønnfjord

205 papers receiving 5.6k citations

Hit Papers

Thrombosis and Thrombocyt... 2021 2026 2022 2024 2021 250 500 750
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Thrombosis and Thrombocytopenia after ChAdOx1 nCoV-19 Vaccination
    2021 969 citations Ludvig A. Munthe, Geir E. Tjønnfjord et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Geir E. Tjønnfjord Norway 37 2.9k 1.6k 1.4k 989 859 217 5.7k
Shinichiro Okamoto Japan 41 3.3k 1.1× 1.3k 0.8× 1.1k 0.7× 467 0.5× 674 0.8× 389 7.1k
Christina Peters Austria 48 4.1k 1.4× 1.1k 0.7× 1.2k 0.8× 711 0.7× 450 0.5× 242 8.2k
Robert W. McKenna United States 41 2.3k 0.8× 1.2k 0.8× 1.4k 0.9× 1.9k 1.9× 333 0.4× 118 5.8k
Åke Öst Sweden 35 2.0k 0.7× 772 0.5× 977 0.7× 715 0.7× 592 0.7× 112 4.4k
Emanuele Angelucci Italy 50 5.2k 1.8× 4.5k 2.8× 678 0.5× 508 0.5× 339 0.4× 305 8.3k
Kirk R. Schultz Canada 45 5.0k 1.7× 1.1k 0.7× 1.8k 1.3× 407 0.4× 470 0.5× 214 7.4k
Mrinal M. Patnaik United States 51 5.5k 1.9× 4.0k 2.5× 1.1k 0.8× 714 0.7× 422 0.5× 479 9.0k
Judith Marsh United Kingdom 52 6.6k 2.2× 2.0k 1.3× 2.7k 1.9× 352 0.4× 682 0.8× 210 9.1k
Mauricette Michallet France 50 6.9k 2.4× 2.2k 1.4× 1.8k 1.2× 996 1.0× 659 0.8× 311 10.0k
Yi‐Bin Chen United States 35 2.1k 0.7× 795 0.5× 1.1k 0.8× 892 0.9× 292 0.3× 197 4.9k

Countries citing papers authored by Geir E. Tjønnfjord

Since Specialization
Citations

This map shows the geographic impact of Geir E. Tjønnfjord's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Geir E. Tjønnfjord with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Geir E. Tjønnfjord more than expected).

Fields of papers citing papers by Geir E. Tjønnfjord

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Geir E. Tjønnfjord. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Geir E. Tjønnfjord. The network helps show where Geir E. Tjønnfjord may publish in the future.

Co-authorship network of co-authors of Geir E. Tjønnfjord

This figure shows the co-authorship network connecting the top 25 collaborators of Geir E. Tjønnfjord. A scholar is included among the top collaborators of Geir E. Tjønnfjord based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Geir E. Tjønnfjord. Geir E. Tjønnfjord is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Holte, Harald, Arne Kolstad, Anders Eivind Myhre, et al.. (2025). Allogeneic stem cell transplantation for patients with lymphoma 2011–21. Tidsskrift for Den norske legeforening. 145(3).
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Richman, Alyssa, Péter Szodoray, Ann Kristin Kvam, et al.. (2024). Transcriptome analysis of primary adult B ‐cell lineage acute lymphoblastic leukemia identifies pathogenic variants and gene fusions, and predicts subtypes for in depth molecular diagnosis. European Journal Of Haematology. 112(5). 731–742. 4 indexed citations
4.
Myklebust, Tor Åge, Mats Remberger, Geir E. Tjønnfjord, et al.. (2024). Allogeneic stem cell transplant recipients surviving at least 2 years without relapse: outcome and risk factors. SHILAP Revista de lepidopterología. 5(1). 117–124. 3 indexed citations
5.
Małecka, Agnieszka, Gunhild Trøen, Jędrzej Małecki, et al.. (2023). Gene expression analysis revealed downregulation of complement receptor 1 in clonal B cells in cold agglutinin disease. Clinical & Experimental Immunology. 216(1). 45–54. 6 indexed citations
6.
Rueegg, Corina S., Lorentz Brinch, Linn Landrø, et al.. (2022). Graft-Versus-Host-Disease and Health-Related Quality of Life in Young Long-term Survivors of Cancer and Allogeneic Hematopoietic Stem Cell Transplantation. Journal of Adolescent and Young Adult Oncology. 12(1). 66–75. 1 indexed citations
7.
Raj, Deepak B. Thimiri Govinda, Sigrid S. Skånland, Geir E. Tjønnfjord, et al.. (2022). Ex vivo drug sensitivity screening in multiple myeloma identifies drug combinations that act synergistically. Molecular Oncology. 16(6). 1241–1258. 14 indexed citations
8.
Berentsen, Sigbjørn & Geir E. Tjønnfjord. (2022). Current Treatment Options in Cold Agglutinin Disease: B-Cell Directed or Complement Directed Therapy?. Transfusion Medicine Reviews. 36(4). 181–187. 7 indexed citations
9.
Skånland, Sigrid S. & Geir E. Tjønnfjord. (2022). Determining drug dose in the era of targeted therapies: playing it (un)safe?. Blood Cancer Journal. 12(8). 123–123. 6 indexed citations
10.
Fernandes, Stacey M., Alberto J. Arribas, Kjetil Taskén, et al.. (2022). Functional Testing to Characterize and Stratify PI3K Inhibitor Responses in Chronic Lymphocytic Leukemia. Clinical Cancer Research. 28(20). 4444–4455. 11 indexed citations
11.
Fløisand, Yngvar, Hanne Scholz, Geir E. Tjønnfjord, et al.. (2021). Placenta-Derived Decidua Stromal Cells for Steroid Refractory Acute Graft-Versus-Host Disease – a Case Report from Two Patients. Transplantation and Cellular Therapy. 27(3). S258–S259.
12.
Tvedt, Tor Henrik Anderson, et al.. (2019). The Systemic Metabolic Profile Early after Allogeneic Stem Cell Transplantation: Effects of Adequate Energy Support Administered through Enteral Feeding Tube. Biology of Blood and Marrow Transplantation. 26(2). 380–391. 7 indexed citations
13.
Kushekhar, Kushi, Ludvig A. Munthe, Geir E. Tjønnfjord, et al.. (2019). The PI3K p110δ Isoform Inhibitor Idelalisib Preferentially Inhibits Human Regulatory T Cell Function. The Journal of Immunology. 202(5). 1397–1405. 106 indexed citations
14.
Hjermstad, Marianne Jensen, Asta Bye, Marit B. Veierød, et al.. (2016). No Effect of Individualized Nutrition on Quality of Life, Acute Graft-Versus-Host Disease or Oral Mucositis after Allogeneic Stem Cell Transplantation: A Randomized Controlled Trial. Blood. 128(22). 2211–2211. 1 indexed citations
15.
Fløisand, Yngvar, Ingunn Dybedal, Tobias Gedde‐Dahl, et al.. (2008). Allogen stamcelletransplantasjon hos voksne med akutt lymfoblastisk leukemi. Tidsskrift for Den Norske Laegeforening. 1 indexed citations
16.
Kildahl‐Andersen, Odd, et al.. (2006). En 40 år gammel kvinne med anemi. Tidsskrift for Den Norske Laegeforening. 1 indexed citations
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18.
Steen, R, et al.. (1997). Efflux of CD34+ Cells from Bone Marrow to Peripheral Blood Is Selective in Steady-State Hematopoiesis and During G-CSF Administration. Journal of Hematotherapy. 6(6). 563–573. 28 indexed citations
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Tjønnfjord, Geir E., O. Petter Veiby, R Steen, & T Egeland. (1993). T lymphocyte differentiation in vitro from adult human prethymic CD34+ bone marrow cells.. The Journal of Experimental Medicine. 177(6). 1531–1539. 65 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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