Klaus Ølgaard

8.7k total citations · 1 hit paper
213 papers, 6.5k citations indexed

About

Klaus Ølgaard is a scholar working on Nephrology, Pulmonary and Respiratory Medicine and Pathology and Forensic Medicine. According to data from OpenAlex, Klaus Ølgaard has authored 213 papers receiving a total of 6.5k indexed citations (citations by other indexed papers that have themselves been cited), including 116 papers in Nephrology, 46 papers in Pulmonary and Respiratory Medicine and 39 papers in Pathology and Forensic Medicine. Recurrent topics in Klaus Ølgaard's work include Parathyroid Disorders and Treatments (91 papers), Vitamin D Research Studies (35 papers) and Magnesium in Health and Disease (25 papers). Klaus Ølgaard is often cited by papers focused on Parathyroid Disorders and Treatments (91 papers), Vitamin D Research Studies (35 papers) and Magnesium in Health and Disease (25 papers). Klaus Ølgaard collaborates with scholars based in Denmark, United States and United Kingdom. Klaus Ølgaard's co-authors include Ewa Lewin, Kévin Martin, Stuart M. Sprague, Tilman B. Drüeke, William G. Goodman, Susan M. Ott, John Cunningham, Garabed Eknoyan, Sharon M. Moe and Norbert Lameire and has published in prestigious journals such as The Lancet, Journal of Clinical Investigation and Nature Immunology.

In The Last Decade

Klaus Ølgaard

207 papers receiving 6.2k citations

Hit Papers

Definition, evaluation, and classification of renal osteo... 2006 2026 2012 2019 2006 400 800 1.2k
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. Definition, evaluation, and classification of renal osteodystrophy: A position statement from Kidney Disease: Improving Global Outcomes (KDIGO)
    2006 1.4k citations Klaus Ølgaard et al. Kidney International profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Klaus Ølgaard Denmark 38 3.6k 1.4k 1.1k 949 911 213 6.5k
Anthony A. Portale United States 40 3.1k 0.9× 1.9k 1.3× 1.2k 1.1× 887 0.9× 1.2k 1.3× 87 5.4k
Adriana Dusso United States 42 3.0k 0.8× 2.9k 2.0× 1.3k 1.2× 658 0.7× 1.0k 1.1× 106 6.0k
Thomas O. Carpenter United States 47 3.7k 1.0× 1.5k 1.0× 1.5k 1.4× 964 1.0× 1.8k 2.0× 158 7.3k
Craig B. Langman United States 45 1.5k 0.4× 1.6k 1.1× 635 0.6× 1.5k 1.5× 680 0.7× 215 7.2k
Lene Heickendorff Denmark 51 1.3k 0.4× 2.0k 1.4× 581 0.5× 811 0.9× 754 0.8× 158 6.7k
Dieter Haffner Germany 44 3.2k 0.9× 931 0.7× 832 0.8× 996 1.0× 1.1k 1.2× 247 6.5k
Otto Mehls Germany 54 3.6k 1.0× 663 0.5× 858 0.8× 1.6k 1.6× 1.0k 1.1× 319 10.6k
Junichiro James Kazama Japan 41 2.8k 0.8× 647 0.5× 708 0.6× 409 0.4× 833 0.9× 222 5.1k
E.B. Mawer United Kingdom 42 952 0.3× 2.8k 2.0× 932 0.8× 454 0.5× 761 0.8× 131 5.3k
Daniel Zehnder United Kingdom 36 1.6k 0.4× 2.2k 1.5× 871 0.8× 491 0.5× 661 0.7× 106 5.3k

Countries citing papers authored by Klaus Ølgaard

Since Specialization
Citations

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

Fields of papers citing papers by Klaus Ølgaard

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Klaus Ølgaard

This figure shows the co-authorship network connecting the top 25 collaborators of Klaus Ølgaard. A scholar is included among the top collaborators of Klaus Ølgaard 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 Klaus Ølgaard. Klaus Ølgaard 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.
Mace, Maria L., Marya Morevati, Anders Nordholm, et al.. (2022). Hypomorphic expression of parathyroid Bmal1 disrupts the internal parathyroid circadian clock and increases parathyroid cell proliferation in response to uremia. Kidney International. 101(6). 1232–1250. 8 indexed citations
2.
Crone, C., Thomas Lindenstrøm, Louise Aagaard, et al.. (2022). Reduced vitamin D-induced cathelicidin production and killing of Mycobacterium tuberculosis in macrophages from a patient with a non-functional vitamin D receptor: A case report. Frontiers in Immunology. 13. 1038960–1038960. 5 indexed citations
3.
Morevati, Marya, Anders Nordholm, Maria L. Mace, et al.. (2021). Effect of NAD+ boosting on kidney ischemia-reperfusion injury. PLoS ONE. 16(6). e0252554–e0252554. 25 indexed citations
4.
Gravesen, Eva, Maria L. Mace, Jacob Hofman-Bang, Klaus Ølgaard, & Ewa Lewin. (2014). Circulating FGF23 Levels in Response to Acute Changes in Plasma Ca2+. Calcified Tissue International. 95(1). 46–53. 14 indexed citations
5.
Main, Katharina M., Claudia Mau, Marla Chellakooty, et al.. (2004). Kidney growth in 717 healthy children aged 0?18�months: a longitudinal cohort study. Pediatric Nephrology. 19(9). 992–1003. 45 indexed citations
6.
Lewin, Ewa, Bartolomé Garfia, Yolanda Almadén, Mariano Rodríguez, & Klaus Ølgaard. (2003). Autoregulation in the parathyroid glands by PTH/PTHrP receptor ligands in normal and uremic rats. Kidney International. 64(1). 63–70. 20 indexed citations
7.
Bro, Susanne, Jacob Fog Bentzon, Erling Falk, et al.. (2003). Chronic Renal Failure Accelerates Atherogenesis in Apolipoprotein E–Deficient Mice. Journal of the American Society of Nephrology. 14(10). 2466–2474. 134 indexed citations
8.
Berthoux, F., Daniel Abramovicz, Henrik Ekberg, et al.. (2002). European Best Practice Guidelines for Renal Transplantation (Part 2).. Lund University Publications (Lund University). 318 indexed citations
9.
Rix, Marianne, Helle Frost Andreassen, Peter Claes Eskildsen, Bente Langdahl, & Klaus Ølgaard. (1999). Bone mineral density and biochemical markers of bone turnover in patients with predialysis chronic renal failure. Kidney International. 56(3). 1084–1093. 238 indexed citations
10.
11.
Bro, Susanne, et al.. (1998). Randomized crossover study comparing the phosphate-binding efficacy of calcium ketoglutarate versus calcium carbonate in patients on chronic hemodialysis. American Journal of Kidney Diseases. 31(2). 257–262. 21 indexed citations
12.
13.
Hemmingsen, Claus, et al.. (1996). Effect of Vitamin D Metabolites and Analogs on Renal and Intestinal Calbindin-D in the Rat. Calcified Tissue International. 59(5). 371–376. 8 indexed citations
14.
Lewin, Ewa, J. Ladefoged, Lisbet Brandi, & Klaus Ølgaard. (1993). Parathyroid hormone dependent T cell proliferation in uremic rats. Kidney International. 44(2). 379–384. 20 indexed citations
15.
16.
Ølgaard, Klaus, et al.. (1990). Cyclosporin A treatment of severe steroid resistant nephrotic syndrome in adults. Journal of Internal Medicine. 227(1). 65–68. 2 indexed citations
17.
Bock, Johannes E., Sven Arvid Birkeland, Joachim G. Klebe, et al.. (1986). Pregnancy Following Kidney Transplantation. Acta Obstetricia Et Gynecologica Scandinavica. 65(6). 557–559. 27 indexed citations
18.
Blichert-Toft, M, A. Engquist, Henrik Kehlet, et al.. (1979). Influence of Age on the Endocrine-Metabolic Response to Surgery. Annals of Surgery. 190(6). 761–770. 19 indexed citations
19.
Madsen, S., Klaus Ølgaard, & J. Ladefoged. (1978). [Measurements of ionized calcium in whole blood and serum. An evaluation of a recently developed analyzer].. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 140(14). 774–7. 1 indexed citations
20.
Madsen, S. & Klaus Ølgaard. (1977). Evaluation of a new automatic calcium ion analyzer.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 23(4). 690–4. 46 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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