Jan Hajer

39 total papers · 1.4k total citations
24 papers, 1.0k citations indexed

About

Jan Hajer is a scholar working on Surgery, Gastroenterology and Molecular Biology. According to data from OpenAlex, Jan Hajer has authored 24 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Surgery, 6 papers in Gastroenterology and 5 papers in Molecular Biology. Recurrent topics in Jan Hajer's work include Cholangiocarcinoma and Gallbladder Cancer Studies (5 papers), Gastrointestinal motility and disorders (4 papers) and Airway Management and Intubation Techniques (3 papers). Jan Hajer is often cited by papers focused on Cholangiocarcinoma and Gallbladder Cancer Studies (5 papers), Gastrointestinal motility and disorders (4 papers) and Airway Management and Intubation Techniques (3 papers). Jan Hajer collaborates with scholars based in Czechia, Israel and Tunisia. Jan Hajer's co-authors include Julius Špičák, Katie MacDonald, Jie Tang, Bernard Levin, Craig Eagle, Janet Wittes, Scott D. Solomon, Ann G. Zauber, Pritha Bhadra and I Rácz and has published in prestigious journals such as New England Journal of Medicine, SHILAP Revista de lepidopterología and Gut.

In The Last Decade

Jan Hajer

23 papers receiving 984 citations

Hit Papers

normalize citations (0→100%) normalize lifespan (0→100%) sort by overperformance

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 benchmark for papers published in the same subfield and year, or reaches the top citation threshold in at least one of its specific research topics.

Celecoxib for the Prevention of Colorectal Adenomatous Polyps

2006 750 citations Nadir Arber, Craig Eagle et al. New England Journal of Medicine profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Jan Hajer	434	358	257	221	179	24	1.0k
George J. Tsioulias	255 0.6×	549 1.5×	351 1.4×	161 0.7×	142 0.8×	28	1.0k
Michael G. Backlund	550 1.3×	194 0.5×	160 0.6×	66 0.3×	184 1.0×	18	1.1k
Elena Piazuelo	260 0.6×	180 0.5×	313 1.2×	113 0.5×	71 0.4×	53	900
Angela M. Acquaviva	294 0.7×	220 0.6×	192 0.7×	69 0.3×	177 1.0×	33	1.1k
Ornella Fantappiè	347 0.8×	321 0.9×	105 0.4×	75 0.3×	162 0.9×	28	1.2k
Kurumi Sasatomi	273 0.6×	185 0.5×	199 0.8×	59 0.3×	153 0.9×	17	1.0k
Mary F. Krutzsch	361 0.8×	273 0.8×	145 0.6×	72 0.3×	202 1.1×	11	1.0k
Adil Akhtar	234 0.5×	478 1.3×	130 0.5×	98 0.4×	127 0.7×	20	1.2k
Daniel Pelot	215 0.5×	214 0.6×	179 0.7×	87 0.4×	98 0.5×	15	906
Kalathur S. Ramanujam	278 0.6×	82 0.2×	362 1.4×	160 0.7×	189 1.1×	17	989

Countries citing papers authored by Jan Hajer

Since Specialization

Citations

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

Fields of papers citing papers by Jan Hajer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Jan Hajer

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

All Works

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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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