Per Ljungman

480 papers and 28.7k indexed citations
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About

Per Ljungman is a scholar working on Hematology, Epidemiology and Oncology. According to data from OpenAlex, Per Ljungman has authored 480 papers receiving a total of 28.7k indexed citations (citations by other indexed papers that have themselves been cited), including 217 papers in Hematology, 216 papers in Epidemiology and 155 papers in Oncology. Recurrent topics in Per Ljungman’s work include Hematopoietic Stem Cell Transplantation (197 papers), Cytomegalovirus and herpesvirus research (131 papers) and Polyomavirus and related diseases (70 papers). Per Ljungman is often cited by papers focused on Hematopoietic Stem Cell Transplantation (197 papers), Cytomegalovirus and herpesvirus research (131 papers) and Polyomavirus and related diseases (70 papers). Per Ljungman collaborates with scholars based in Sweden, Germany and France. Per Ljungman's co-authors include Olle Ringdén, Michael Boeckh, Paul Griffiths, Catherine Cordonnier, Carlos V. Payá, Mats Remberger, Dietger Niederwieser, J Aschan, Rafael de la Cámara and N Jacobsen and has published in prestigious journals such as New England Journal of Medicine, The Lancet and Journal of Clinical Oncology.

In The Last Decade

Co-authorship network of co-authors of Per Ljungman

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

Fields of papers citing papers by Per Ljungman

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Per Ljungman

Since Specialization
Citations

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