Lars Karlsen

585 total citations
19 papers, 432 citations indexed

About

Lars Karlsen is a scholar working on Epidemiology, Genetics and Surgery. According to data from OpenAlex, Lars Karlsen has authored 19 papers receiving a total of 432 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Epidemiology, 7 papers in Genetics and 4 papers in Surgery. Recurrent topics in Lars Karlsen's work include Inflammatory Bowel Disease (7 papers), Fibromyalgia and Chronic Fatigue Syndrome Research (4 papers) and Liver Disease Diagnosis and Treatment (4 papers). Lars Karlsen is often cited by papers focused on Inflammatory Bowel Disease (7 papers), Fibromyalgia and Chronic Fatigue Syndrome Research (4 papers) and Liver Disease Diagnosis and Treatment (4 papers). Lars Karlsen collaborates with scholars based in Norway, Denmark and United States. Lars Karlsen's co-authors include F Moesgaard, S Bülow, Tore Grimstad, Lars Aabakken, Kjetil Isaksen, Marie Luise Bisgaard, Roald Omdal, Olav Dalgård, Inger Marie Skoie and Per Sandvei and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and Journal of Hepatology.

In The Last Decade

Lars Karlsen

16 papers receiving 424 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Lars Karlsen Norway 8 220 132 129 114 112 19 432
J. H. Bourhis France 12 54 0.2× 46 0.3× 59 0.5× 117 1.0× 13 0.1× 35 507
Kyoo Hyung Lee South Korea 11 101 0.5× 83 0.6× 52 0.4× 116 1.0× 17 0.2× 44 405
Eun Hye Oh South Korea 12 222 1.0× 26 0.2× 31 0.2× 94 0.8× 226 2.0× 54 466
Marylise Fort France 11 81 0.4× 63 0.5× 14 0.1× 44 0.4× 19 0.2× 24 521
G. Wiseman Australia 8 52 0.2× 38 0.3× 202 1.6× 125 1.1× 22 0.2× 10 372
Cristina B. Geltzeiler United States 10 83 0.4× 55 0.4× 24 0.2× 174 1.5× 81 0.7× 15 503
Augusto Tagliamacco Italy 13 90 0.4× 37 0.3× 22 0.2× 97 0.9× 22 0.2× 20 539
V.R. Peddi United States 13 103 0.5× 22 0.2× 16 0.1× 143 1.3× 21 0.2× 33 546
Jean‐Marc Doutrelepont Belgium 11 69 0.3× 56 0.4× 20 0.2× 56 0.5× 30 0.3× 18 451
Jacqueline So China 9 131 0.6× 44 0.3× 29 0.2× 19 0.2× 23 0.2× 18 237

Countries citing papers authored by Lars Karlsen

Since Specialization
Citations

This map shows the geographic impact of Lars Karlsen'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 Lars Karlsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Lars Karlsen more than expected).

Fields of papers citing papers by Lars Karlsen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Lars Karlsen. 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 Lars Karlsen. The network helps show where Lars Karlsen may publish in the future.

Co-authorship network of co-authors of Lars Karlsen

This figure shows the co-authorship network connecting the top 25 collaborators of Lars Karlsen. A scholar is included among the top collaborators of Lars Karlsen 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 Lars Karlsen. Lars Karlsen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

19 of 19 papers shown
1.
Søreide, Kjetil, et al.. (2025). Malpractice and compensation claims for acute pancreatitis in Norway: characteristics of claimants, claim-rates, outcomes and indemnity compensation. Scandinavian Journal of Gastroenterology. 60(10). 1032–1042.
2.
Grimstad, Tore, Jan Terje Kvaløy, Nils Bolstad, et al.. (2025). Fatigue in Inflammatory Bowel Disease: No Effect of Serum Concentrations of Infliximab, Adalimumab or Anti‐Drug Antibodies During Maintenance Therapy. Scandinavian Journal of Immunology. 101(5). e70029–e70029.
3.
Detlie, Trond Espen, Lars Karlsen, Erik Jørgensen, Neesha Nanu, & Richard F. Pollock. (2024). Evaluating the cost-utility of ferric derisomaltose versus ferric carboxymaltose in patients with inflammatory bowel disease and iron deficiency anaemia in Norway. Journal of Medical Economics. 28(1). 291–301.
4.
Søreide, Jon Arne, Jan Terje Kvaløy, Oddvar M. Sandvik, et al.. (2021). The overriding role of surgery and tumor grade for long‐term survival in patients with gastroenteropancreatic neuroendocrine neoplasms: A population‐based cohort study. Cancer Reports. 5(2). e1462–e1462. 6 indexed citations
5.
Grimstad, Tore, Jan Terje Kvaløy, Inger Marie Skoie, et al.. (2021). The influence of disease activity on fatigue in patients with ulcerative colitis – a longitudinal study. Scandinavian Journal of Gastroenterology. 57(3). 290–297. 7 indexed citations
6.
Omdal, Roald, Lars Karlsen, Jan Terje Kvaløy, et al.. (2019). Determination of lower cut‐off levels of adalimumab associated with biochemical remission in Crohn's disease. JGH Open. 4(3). 410–416. 3 indexed citations
7.
Grimstad, Tore, et al.. (2019). Medikamentell behandling ved fistulerende Crohns sykdom. Tidsskrift for Den norske legeforening. 139(1). 4 indexed citations
8.
Dalgård, Olav, Ola Weiland, Geir Noraberg, et al.. (2017). Sofosbuvir based treatment of chronic hepatitis C genotype 3 infections—A Scandinavian real-life study. PLoS ONE. 12(7). e0179764–e0179764. 23 indexed citations
9.
Midgard, Håvard, A Mæland, Zbigniew Konopski, et al.. (2016). Hepatitis C reinfection after sustained virological response. Journal of Hepatology. 64(5). 1020–1026. 104 indexed citations
10.
Grimstad, Tore, Katrine Brække Norheim, Jan Terje Kvaløy, et al.. (2016). Conventional treatment regimens for ulcerative colitis alleviate fatigue – an observational cohort study. Scandinavian Journal of Gastroenterology. 51(10). 1213–1219. 11 indexed citations
11.
Grimstad, Tore, Inger Marie Skoie, Jessica Doerner, et al.. (2016). TWEAK is not elevated in patients with newly diagnosed inflammatory bowel disease. Scandinavian Journal of Gastroenterology. 52(4). 420–424. 5 indexed citations
12.
Grimstad, Tore, Katrine Brække Norheim, Kjetil Isaksen, et al.. (2015). Fatigue in Newly Diagnosed Inflammatory Bowel Disease. Journal of Crohn s and Colitis. 9(9). 725–730. 73 indexed citations
13.
Isaksen, Kjetil, Lars Aabakken, Tore Grimstad, et al.. (2015). Hepatitt C-behandling ved tre norske sykehus 2000 – 11. Tidsskrift for Den norske legeforening. 135(22). 2052–2058. 3 indexed citations
14.
Grimstad, Tore, Michael Bretthauer, Øyvind Holme, et al.. (2014). Polyethylene glycol vs sodium picosulfate/magnesium citrate for colonoscopy preparation. SHILAP Revista de lepidopterología. 2(4). E230–E234. 16 indexed citations
15.
Dalgård, Olav, Zbigniew Konopski, Per Sandvei, et al.. (2011). Hepatitt C - utredning og behandling. Tidsskrift for Den norske legeforening. 131(1). 2–9. 2 indexed citations
16.
Ljung, Tryggve, Ole Østergaard Thomsen, Morten Vatn, et al.. (2006). Granulocyte, monocyte/macrophage apheresis for inflammatory bowel disease: The first 100 patients treated in Scandinavia. Scandinavian Journal of Gastroenterology. 42(2). 221–227. 41 indexed citations
17.
Bülow, S, et al.. (1996). [Prognosis in familial adenomatous polyposis. Results from the Polyposis Registry].. PubMed. 158(29). 4188–90. 3 indexed citations
18.
Bisgaard, Marie Luise, et al.. (1996). The incidence rate of familial adenomatous polyposis. International Journal of Colorectal Disease. 11(2). 88–91. 58 indexed citations
19.

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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