Holger Siemann

1.4k total citations
8 papers, 558 citations indexed

About

Holger Siemann is a scholar working on Clinical Psychology, Toxicology and Epidemiology. According to data from OpenAlex, Holger Siemann has authored 8 papers receiving a total of 558 indexed citations (citations by other indexed papers that have themselves been cited), including 3 papers in Clinical Psychology, 3 papers in Toxicology and 2 papers in Epidemiology. Recurrent topics in Holger Siemann's work include Forensic Toxicology and Drug Analysis (3 papers), Psychedelics and Drug Studies (3 papers) and Hepatitis C virus research (2 papers). Holger Siemann is often cited by papers focused on Forensic Toxicology and Drug Analysis (3 papers), Psychedelics and Drug Studies (3 papers) and Hepatitis C virus research (2 papers). Holger Siemann collaborates with scholars based in United Kingdom, Germany and Spain. Holger Siemann's co-authors include Norbert Scherbaum, Fabrizio Schifano, Paolo Deluca, Marta Torrens, Zoe Davey, Ornella Corazza, Magı́ Farré, Zsolt Demetrovics, A. Hamid Ghodse and Jacqueline L. Stair and has published in prestigious journals such as Journal of Hepatology, Psychopharmacology and Progress in Neuro-Psychopharmacology and Biological Psychiatry.

In The Last Decade

Holger Siemann

8 papers receiving 540 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Holger Siemann United Kingdom 7 389 287 194 101 101 8 558
Michael Evans‐Brown Portugal 13 353 0.9× 173 0.6× 117 0.6× 162 1.6× 109 1.1× 28 700
Hiroyuki Inoue Japan 15 336 0.9× 131 0.5× 129 0.7× 38 0.4× 22 0.2× 38 560
Ioanna Vardakou Greece 6 359 0.9× 176 0.6× 130 0.7× 233 2.3× 40 0.4× 10 496
Rachel Christie United Kingdom 11 320 0.8× 144 0.5× 98 0.5× 114 1.1× 96 1.0× 25 540
Barbara Loi United Kingdom 9 210 0.5× 126 0.4× 127 0.7× 91 0.9× 38 0.4× 12 307
Silja Skogstad Tuv Norway 8 282 0.7× 155 0.5× 95 0.5× 129 1.3× 24 0.2× 15 339
Marcel·lí Carbó Spain 15 256 0.7× 190 0.7× 171 0.9× 153 1.5× 13 0.1× 22 517
Laureen J. Marinetti United States 12 414 1.1× 157 0.5× 107 0.6× 71 0.7× 22 0.2× 16 551
Kyriaki Aroni Greece 14 101 0.3× 103 0.4× 38 0.2× 51 0.5× 56 0.6× 27 426
Christine Murphy United States 12 216 0.6× 142 0.5× 71 0.4× 86 0.9× 44 0.4× 30 588

Countries citing papers authored by Holger Siemann

Since Specialization
Citations

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

Fields of papers citing papers by Holger Siemann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Holger Siemann

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

All Works

8 of 8 papers shown
1.
Walker, Andreas, et al.. (2015). Natural prevalence of resistance-associated variants in hepatitis C virus NS5A in genotype 3a-infected people who inject drugs in Germany. Journal of Clinical Virology. 70. 43–45. 12 indexed citations
2.
Berger, Christoph T., Martin Trippler, Holger Siemann, et al.. (2014). KIR2DL3+NKG2A− natural killer cells are associated with protection from productive hepatitis C virus infection in people who inject drugs. Journal of Hepatology. 61(3). 475–481. 34 indexed citations
3.
Scherbaum, Norbert, Fabrizio Schifano, & Holger Siemann. (2014). Neue psychotrope Substanzen – „Legal Highs“. Fortschritte der Neurologie · Psychiatrie. 82(9). 532–543. 2 indexed citations
4.
Deluca, Paolo, Zoe Davey, Ornella Corazza, et al.. (2012). Identifying emerging trends in recreational drug use; outcomes from the Psychonaut Web Mapping Project. Progress in Neuro-Psychopharmacology and Biological Psychiatry. 39(2). 221–226. 138 indexed citations
5.
Corazza, Ornella, Fabrizio Schifano, Magı́ Farré, et al.. (2011). Designer Drugs on the Internet: A Phenomenon Out-of-Control? The Emergence of Hallucinogenic Drug Bromo-Dragonfly. Current Clinical Pharmacology. 6(2). 125–129. 63 indexed citations
6.
Schifano, Fabrizio, Suzanne Fergus, Jacqueline L. Stair, et al.. (2010). Mephedrone (4-methylmethcathinone; ‘meow meow’): chemical, pharmacological and clinical issues. Psychopharmacology. 214(3). 593–602. 246 indexed citations
7.
Schifano, Fabrizio, Ornella Corazza, Paolo Deluca, et al.. (2009). Psychoactive drug or mystical incense? Overview of the online available information on Spice products. International Journal of Culture and Mental Health. 2(2). 137–144. 55 indexed citations
8.
Siemann, Holger, Michael Specka, Fabrizio Schifano, Paolo Deluca, & Norbert Scherbaum. (2006). Salvia divinorum - Präsenz einer neuen Droge im Internet. Das Gesundheitswesen. 68(5). 323–327. 8 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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