Ulrich Frei

239 papers and 11.2k indexed citations
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About

Ulrich Frei is a scholar working on Surgery, Transplantation and Nephrology. According to data from OpenAlex, Ulrich Frei has authored 239 papers receiving a total of 11.2k indexed citations (citations by other indexed papers that have themselves been cited), including 77 papers in Surgery, 72 papers in Transplantation and 50 papers in Nephrology. Recurrent topics in Ulrich Frei’s work include Renal Transplantation Outcomes and Treatments (71 papers), Organ Transplantation Techniques and Outcomes (47 papers) and Dialysis and Renal Disease Management (29 papers). Ulrich Frei is often cited by papers focused on Renal Transplantation Outcomes and Treatments (71 papers), Organ Transplantation Techniques and Outcomes (47 papers) and Dialysis and Renal Disease Management (29 papers). Ulrich Frei collaborates with scholars based in Germany, United States and Switzerland. Ulrich Frei's co-authors include Kai‐Uwe Eckardt, Michael S. Wiesener, Christian Rosenberger, Henrik Ekberg, Ralf Schindler, Achim Jörres, Š Vı́tko, Pierre Daloze, A. Demirbaş and Christian Hugo and has published in prestigious journals such as New England Journal of Medicine, Journal of Clinical Investigation and Blood.

In The Last Decade

Co-authorship network of co-authors of Ulrich Frei

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

Fields of papers citing papers by Ulrich Frei

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Ulrich Frei

Since Specialization
Citations

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

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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2026