Ulf Johnson

1.4k total citations
51 papers, 1.1k citations indexed

About

Ulf Johnson is a scholar working on Immunology, Neurology and Hematology. According to data from OpenAlex, Ulf Johnson has authored 51 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Immunology, 11 papers in Neurology and 9 papers in Hematology. Recurrent topics in Ulf Johnson's work include Traumatic Brain Injury and Neurovascular Disturbances (10 papers), Coagulation, Bradykinin, Polyphosphates, and Angioedema (8 papers) and Complement system in diseases (7 papers). Ulf Johnson is often cited by papers focused on Traumatic Brain Injury and Neurovascular Disturbances (10 papers), Coagulation, Bradykinin, Polyphosphates, and Angioedema (8 papers) and Complement system in diseases (7 papers). Ulf Johnson collaborates with scholars based in Sweden, Zimbabwe and Netherlands. Ulf Johnson's co-authors include K. Eberhardt, Per Enblad, Tim Howells, Kjell Jonsson, Anna‐Brita Laurell, Elisabeth Ronne-Engström, K. Ohlsson, Inge Olsson, Björn Gustavii and Tomas McKelvey and has published in prestigious journals such as Journal of neurosurgery, Annals of the Rheumatic Diseases and Neurosurgery.

In The Last Decade

Ulf Johnson

50 papers receiving 1.0k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ulf Johnson Sweden 20 366 282 209 151 149 51 1.1k
John Verrier Jones Canada 20 583 1.6× 155 0.5× 507 2.4× 167 1.1× 159 1.1× 47 1.3k
J. R. Kalden Germany 15 663 1.8× 155 0.5× 377 1.8× 388 2.6× 101 0.7× 49 1.4k
W. Brandeis Germany 19 256 0.7× 237 0.8× 236 1.1× 97 0.6× 214 1.4× 48 1.4k
Siegfried Köhler Germany 20 207 0.6× 457 1.6× 856 4.1× 55 0.4× 153 1.0× 35 1.7k
Lorenzo Emmi Italy 23 618 1.7× 184 0.7× 526 2.5× 117 0.8× 235 1.6× 63 2.0k
Alex Zvulunov Israel 23 196 0.5× 253 0.9× 123 0.6× 21 0.1× 82 0.6× 59 1.5k
Astrid Samuelsson Sweden 7 126 0.3× 91 0.3× 687 3.3× 478 3.2× 336 2.3× 10 1.2k
Mittermayer B. Santiago Brazil 20 1.3k 3.5× 160 0.6× 659 3.2× 403 2.7× 108 0.7× 65 1.8k
Daphna Paran Israel 25 1.0k 2.8× 112 0.4× 791 3.8× 267 1.8× 412 2.8× 76 2.1k
Debra A. Goldstein United States 31 469 1.3× 268 1.0× 105 0.5× 373 2.5× 127 0.9× 163 3.1k

Countries citing papers authored by Ulf Johnson

Since Specialization
Citations

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

Fields of papers citing papers by Ulf Johnson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ulf Johnson

This figure shows the co-authorship network connecting the top 25 collaborators of Ulf Johnson. A scholar is included among the top collaborators of Ulf Johnson 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 Ulf Johnson. Ulf Johnson 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.
Howells, Tim, Ulf Johnson, Tomas McKelvey, Elisabeth Ronne-Engström, & Per Enblad. (2016). The effects of ventricular drainage on the intracranial pressure signal and the pressure reactivity index. Journal of Clinical Monitoring and Computing. 31(2). 469–478. 27 indexed citations
2.
Johnson, Ulf, Anders Lewén, Elisabeth Ronne-Engström, Tim Howells, & Per Enblad. (2014). Should the Neurointensive Care Management of Traumatic Brain Injury Patients be Individualized According to Autoregulation Status and Injury Subtype?. Neurocritical Care. 21(2). 259–265. 26 indexed citations
3.
Rostami, Elham, Henrik Engquist, Ulf Johnson, et al.. (2014). Monitoring of Cerebral Blood Flow and Metabolism Bedside in Patients with Subarachnoid Hemorrhage – A Xenon-CT and Microdialysis Study. Frontiers in Neurology. 5. 89–89. 16 indexed citations
4.
Howells, Tim, Ulf Johnson, Tomas McKelvey, & Per Enblad. (2014). An optimal frequency range for assessing the pressure reactivity index in patients with traumatic brain injury. Journal of Clinical Monitoring and Computing. 29(1). 97–105. 72 indexed citations
5.
Wesslén, Lars, et al.. (2005). Bartonella spp. seroprevalence in healthy Swedish blood donors. Scandinavian Journal of Infectious Diseases. 37(10). 723–730. 37 indexed citations
6.
Persson, Patrik, et al.. (2005). Factors influencing factor VIII activity in frozen plasma. Vox Sanguinis. 90(1). 33–39. 22 indexed citations
7.
Ericson, Dan, et al.. (2001). HLA‐DR4 and salivary immunoglobulin A reactions to oral streptococci. Oral Microbiology and Immunology. 16(1). 45–53. 8 indexed citations
8.
Johnson, Ulf, et al.. (1997). HLA-DR4 and number of mutans streptococci in saliva among dental students and staff. Acta Odontologica Scandinavica. 55(5). 296–298. 6 indexed citations
9.
10.
Welinder, Hans, et al.. (1996). Brief Communication. Journal of Occupational and Environmental Medicine. 38(11). 1087–1090. 5 indexed citations
11.
Jonsson, Kjell, et al.. (1995). DEVELOPMENT OF RADIOGRAPHIC DAMAGE DURING THE FIRST 5–6 YR OF RHEUMATOID ARTHRITIS. A PROSPECTIVE FOLLOW-UP STUDY OF A SWEDISH COHORT. Lara D. Veeken. 35(11). 1106–1115. 152 indexed citations
12.
Kalm, Olof, Ulf Johnson, & Karin Prellner. (1994). HLA frequency in patients with chronic secretory otitis media. International Journal of Pediatric Otorhinolaryngology. 30(2). 151–157. 21 indexed citations
13.
Eberhardt, K., R. Grubb, Ulf Johnson, & H. Pettersson. (1993). HLA-DR antigens, Gm allotypes and antiallotypes in early rheumatoid arthritis--their relation to disease progression.. PubMed. 20(11). 1825–9. 21 indexed citations
14.
Kalm, Olof, et al.. (1992). HLA Antigens and Recurrent Acute Otitis Media. Acta Oto-Laryngologica. 112(sup492). 107–109. 3 indexed citations
15.
Kalm, Olof, et al.. (1991). HLA Frequency in Patients With Recurrent Acute Otitis Media. Archives of Otolaryngology - Head and Neck Surgery. 117(11). 1296–1299. 30 indexed citations
16.
Ericson, Dan, et al.. (1991). Human leukocyte antigens in relation to colonization by mutans streptococci in the oral cavity. Oral Microbiology and Immunology. 6(5). 292–294. 10 indexed citations
17.
Mellergård, Pekka, Bengt Ljunggren, Lennart Brandt, Ulf Johnson, & S. Holtås. (1989). HLA-typing in a Family with Six Intracranial Aneurysms. British Journal of Neurosurgery. 3(4). 479–485. 24 indexed citations
18.
Johnson, Ulf, Lennart Truedsson, & Björn Gustavii. (1983). Complement components in 100 newborns and their mothers determined by electroimmunoassay.. PubMed. 91(2). 147–50. 52 indexed citations
19.
Johnson, Ulf. (1978). THE ROLE OF C1s, C1r AND PROPERDIN IN THE INITIATION OF THE C3b‐DEPENDENT FEEDBACK MECHANISM OF THE COMPLEMENT SYSTEM. Acta Pathologica Microbiologica Scandinavica Section C Immunology. 86C(1-6). 73–78. 1 indexed citations
20.
Johnson, Ulf, et al.. (1977). Cl subcomponents in acute pneumococcal otitis media in children.. Apmis. 85(1). 10–16. 16 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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