Lars Halvorsen

565 total citations
22 papers, 429 citations indexed

About

Lars Halvorsen is a scholar working on Surgery, Gastroenterology and Epidemiology. According to data from OpenAlex, Lars Halvorsen has authored 22 papers receiving a total of 429 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Surgery, 9 papers in Gastroenterology and 6 papers in Epidemiology. Recurrent topics in Lars Halvorsen's work include Helicobacter pylori-related gastroenterology studies (10 papers), Gastroesophageal reflux and treatments (6 papers) and Gastrointestinal motility and disorders (3 papers). Lars Halvorsen is often cited by papers focused on Helicobacter pylori-related gastroenterology studies (10 papers), Gastroesophageal reflux and treatments (6 papers) and Gastrointestinal motility and disorders (3 papers). Lars Halvorsen collaborates with scholars based in Norway, Sweden and United Kingdom. Lars Halvorsen's co-authors include G. Dotevall, N Hovdenak, Finn Egil Skjeldestad, Hilli Sevelius, A. Walan, L. Carling, Peter Unge, Arnold Berstad, E. Kittang and O. Lange and has published in prestigious journals such as SHILAP Revista de lepidopterología, Alimentary Pharmacology & Therapeutics and Scandinavian Journal of Gastroenterology.

In The Last Decade

Lars Halvorsen

21 papers receiving 383 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Lars Halvorsen Norway	11	214	176	93	83	54	22	429
Brian Calcraft United Kingdom	13	147 0.7×	91 0.5×	105 1.1×	165 2.0×	71 1.3×	19	449
Jan Ejderhamn Sweden	12	166 0.8×	78 0.4×	74 0.8×	82 1.0×	70 1.3×	26	384
Adam C. Ehrlich United States	11	171 0.8×	149 0.8×	76 0.8×	71 0.9×	61 1.1×	37	413
T Gledhill United Kingdom	11	356 1.7×	238 1.4×	34 0.4×	14 0.2×	10 0.2×	30	471
R. Gotthard Sweden	13	379 1.8×	358 2.0×	95 1.0×	62 0.7×	17 0.3×	21	579
Peter Szego Canada	9	170 0.8×	41 0.2×	114 1.2×	107 1.3×	15 0.3×	14	392
L Újszászy Hungary	6	255 1.2×	227 1.3×	60 0.6×	26 0.3×	14 0.3×	15	441
Astrid Løvik Norway	9	128 0.6×	205 1.2×	168 1.8×	25 0.3×	67 1.2×	17	373
М. А. Ливзан Russia	9	190 0.9×	184 1.0×	130 1.4×	66 0.8×	23 0.4×	178	432
Jamie B. Howell United States	8	80 0.4×	29 0.2×	111 1.2×	134 1.6×	22 0.4×	10	331

Countries citing papers authored by Lars Halvorsen

Since Specialization

Citations

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

Fields of papers citing papers by Lars Halvorsen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Lars Halvorsen

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

All Works

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20 of 20 papers shown

Trinh, Nhung TH, Jared Houghtaling, Luigi A. Maglanoc, et al.. (2024). Harmonizing Norwegian registries onto OMOP common data model: Mapping challenges and opportunities for pregnancy and COVID-19 research. International Journal of Medical Informatics. 191. 105602–105602. 2 indexed citations

Raventós, Berta, Sergio Fernández‐Bertolín, María Aragón, et al.. (2023). Transforming the Information System for Research in Primary Care (SIDIAP) in Catalonia to the OMOP Common Data Model and Its Use for COVID-19 Research. Clinical Epidemiology. Volume 15. 969–986. 6 indexed citations

Skjeldestad, Finn Egil, et al.. (2006). A randomized trial on the clinical performance of Nova T®380 and Gyne T®380 Slimline copper IUDs. Contraception. 75(3). 171–176. 17 indexed citations

Halvorsen, Lars, Bouke P. C. Hazenberg, Andrzej Nowak, et al.. (1997). Prevention of Relapse in Reflux Esophagitis: A Placebo Controlled Study of Ranitidine 150 mg BID and 300 mg BID. SHILAP Revista de lepidopterología. 11(1). 83–88. 6 indexed citations

Skjeldestad, Finn Egil, et al.. (1996). IUD users in Norway are at low risk for genital C. trachomatis infection. Contraception. 54(4). 209–212. 22 indexed citations

Löfberg, Robert, Ole Østergaard Thomsen, Ebbe Langholz, et al.. (1994). Budesonide versus prednisolone retention enemas in active distal ulcerative colitis. Alimentary Pharmacology & Therapeutics. 8(6). 623–629. 87 indexed citations

Halvorsen, Lars, et al.. (1994). Thermal feedback in virtual reality and telerobotic systems. NASA Technical Reports Server (NASA). 5 indexed citations

Hatlebakk, Jan Gunnar, Arnold Berstad, L. Carling, et al.. (1993). Lansoprazole versus Omeprazole in Short-Term Treatment of Reflux Oesophagitis Results of a Scandinavian Multicentre Trial. Scandinavian Journal of Gastroenterology. 28(3). 224–228. 105 indexed citations

Skjeldestad, Finn Egil, et al.. (1990). Should asymptomatic patients be tested for Chlamydia trachomatis in general practice?. PubMed. 40(333). 142–5. 25 indexed citations

10.

Halvorsen, Lars, et al.. (1989). Acute treatment of reflux oesophagitis: a multicentre study to compare 150 mg ranitidine twice daily with 300 mg ranitidine at bedtime. Alimentary Pharmacology & Therapeutics. 3(2). 171–181. 14 indexed citations

11.

Farup, Per G., et al.. (1989). Duodenal Ulcer Treated with Omeprazole: Healing and Relapse Rates. Scandinavian Journal of Gastroenterology. 24(9). 1107–1112. 10 indexed citations

12.

Hovdenak, N, et al.. (1986). Local Disodium Cromoglycate Is Ineffective in Ulcerative Proctosigmoiditis. Acta Medica Scandinavica. 219(5). 497–500. 5 indexed citations

13.

Næsdal, J., Tore Lind, Per G. Farup, et al.. (1985). The Rate of Healing of Duodenal Ulcers during Omeprazole Treatment. Scandinavian Journal of Gastroenterology. 20(6). 691–695. 16 indexed citations

14.

Halvorsen, Lars, et al.. (1984). Doxepin in the Treatment of Duodenal Ulcer. Scandinavian Journal of Gastroenterology. 19(7). 923–925. 8 indexed citations

15.

Valnes, K, et al.. (1982). Long-term treatment of duodenal ulcer with trimipramine. A double-blind study.. PubMed. 17(8). 1003–7. 7 indexed citations

16.

Valnes, K, et al.. (1980). Trimipramine in the treatment of duodenal ulcer. A multicenter, open study.. PubMed. 58. 65–70. 6 indexed citations

17.

Wetterhus, S, T Bjerkeset, Lars Halvorsen, et al.. (1977). The effect of trimipramine (Surmontil) on symptoms and healing of peptic ulcer. A double blind study.. PubMed. 43. 33–8. 9 indexed citations

18.

Ekenved, Gunnar, Lars Halvorsen, & L Sölvell. (1976). INFLUENCE OF A LIQUID ANTACID ON THE ABSORPTION OF DIFFERENT IRON SALTS. Scandinavian Journal of Haematology. 17(S28). 65–77. 17 indexed citations

19.

Halvorsen, Lars, G. Dotevall, & Hilli Sevelius. (1973). Comparative Effects of Aspirin and Naproxen on Gastric Mucosa. Scandinavian Journal of Rheumatology. 2(sup2). 43–47. 33 indexed citations

20.

Halvorsen, Lars, G. Dotevall, & A. Walan. (1973). Gastric Emptying in Patients with Achlorhydria or Hyposecretion of Hydrochloric Acid. Scandinavian Journal of Gastroenterology. 8(5). 395–399. 26 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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