Annika Y. Claßen

1.4k total citations
21 papers, 327 citations indexed

About

Annika Y. Claßen is a scholar working on Epidemiology, Infectious Diseases and Oncology. According to data from OpenAlex, Annika Y. Claßen has authored 21 papers receiving a total of 327 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Epidemiology, 7 papers in Infectious Diseases and 6 papers in Oncology. Recurrent topics in Annika Y. Claßen's work include Neutropenia and Cancer Infections (6 papers), Pneumocystis jirovecii pneumonia detection and treatment (3 papers) and Fungal Infections and Studies (3 papers). Annika Y. Claßen is often cited by papers focused on Neutropenia and Cancer Infections (6 papers), Pneumocystis jirovecii pneumonia detection and treatment (3 papers) and Fungal Infections and Studies (3 papers). Annika Y. Claßen collaborates with scholars based in Germany, United States and Sweden. Annika Y. Claßen's co-authors include Olaf Penack, Sibylle C. Mellinghoff, Dieter Buchheidt, Matthias Kochanek, Marcus Hentrich, Enrico Schalk, Boris Böll, Michael Kiehl, Marie von Lilienfeld‐Toal and Larissa Henze and has published in prestigious journals such as Clinical Infectious Diseases, European Journal of Cancer and International Journal of Antimicrobial Agents.

In The Last Decade

Annika Y. Claßen

15 papers receiving 315 citations

Peers

Countries citing papers authored by Annika Y. Claßen

Since Specialization

Citations

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

Fields of papers citing papers by Annika Y. Claßen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Annika Y. Claßen. 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 Annika Y. Claßen. The network helps show where Annika Y. Claßen may publish in the future.

Co-authorship network of co-authors of Annika Y. Claßen

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

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Identifying patients at high risk for antibiotic treatment following hospital admission: a predictive score to improve antimicrobial stewardship measures 2025 ·Infection ·(unknown), (unknown), Uga Dumpis, Christian G. Giske, Siri Goepel, Silje Bakken Jørgensen, Johanna Kessel, (unknown), (unknown), (unknown), Makeda Semret, Gunnar Skov Simonsen, Maria J. G. T. Vehreschild, Kerstin Albus, Lena M. Biehl, Jörg Janne Vehreschild, Annika Y. Claßen, (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown)	0
2	Cross-border dialogue: An international survey of regulators on phage therapy 2025 ·International Journal of Antimicrobial Agents ·(unknown), (unknown), Annika Y. Claßen, (unknown), Pieter‐Jan Ceyssens, Greg J. German	0
3	Inter- and intra-bacterial strain diversity remains the “elephant in the (living) room” 2025 ·PubMed ·Adam Valček, Carsten Kröger, (unknown), Ronan R. McCarthy, Tom Coenye, M. Stephen Trent, Nabil Karah, Bernt Eric Uhlin, Annika Y. Claßen, Paul G. Higgins, Ingo Ebersberger, Maria-Halima Laaberki, Xavier Charpentier, Paolo Visca, Philip N. Rather, Charles Van der Henst	0
4	Real-world experience with letermovir for cytomegalovirus-prophylaxis after allogeneic hematopoietic cell transplantation: A multi-centre observational study 2024 ·Journal of Infection ·Sina M. Hopff, (unknown), Annika Y. Claßen, (unknown), Gesine Bug, (unknown), Sabrina Kraus, Olaf Penack, (unknown), (unknown), Torsten Steinbrunn, Daniel Teschner, Jörg Janne Vehreschild, Claudia Wehr	7
5	Phage Therapy in Germany—Update 2023 2023 ·Viruses ·Christian Willy, Joachim J. Bugert, Annika Y. Claßen, Li Deng, (unknown), Justus Groß, Jens A. Hammerl, (unknown), C. Kühn, (unknown), Christine H. Rohde, Markus Rupp, Maria J. G. T. Vehreschild, Kilian Vogele, (unknown), Martin Witzenrath, Silvia Würstle, Holger Ziehr, Karin Moelling, Felix Broecker	25
6	Entwicklung und Validierung potenzieller Strukturindikatoren zur Evaluierung des klinisch-infektiologischen Versorgungsangebots in deutschen Krankenhäusern während der COVID-19-Pandemie 2023 ·Zeitschrift für Evidenz Fortbildung und Qualität im Gesundheitswesen ·(unknown), Melanie Stecher, Annika Y. Claßen, Norma Jung, Lukas Eberwein, Anette Friedrichs, Hartwig Klinker, Maximilian Schons, Christoph D. Spinner, Maria J. G. T. Vehreschild, Katja de With, Jörg Janne Vehreschild	0
7	Infektionsmanagement bei Immunsupprimierten 2022 ·DMW - Deutsche Medizinische Wochenschrift ·Sibylle C. Mellinghoff, Jannik Stemler, (unknown), (unknown), Annika Y. Claßen	0
8	Primary prophylaxis of bacterial infections and Pneumocystis jirovecii pneumonia in patients with hematologic malignancies and solid tumors: 2020 updated guidelines of the Infectious Diseases Working Party of the German Society of Hematology and Medical Oncology (AGIHO/DGHO) 2021 ·Annals of Hematology ·Annika Y. Claßen, Larissa Henze, Marie von Lilienfeld‐Toal, Georg Maschmeyer, Michael Sandherr, Luisa Durán Graeff, Nael Alakel, Maximilian Christopeit, Stefan W. Krause, Karin Mayer, Silke Neumann, Oliver A. Cornely, Olaf Penack, Florian Weißinger, Hans‐Heinrich Wolf, Jörg Janne Vehreschild	46
9	Association between the dietary regimen and infection-related complications in neutropenic high-risk patients with cancer 2021 ·European Journal of Cancer ·Carolin Jakob, Annika Y. Claßen, Melanie Stecher, Andreas Engert, (unknown), Axel Hamprecht, Nathalie Jazmati, Hilmar Wisplinghoff, Michael Hallek, Oliver A. Cornely, Jörg Janne Vehreschild	7
10	Antibiotic prescription in primary care from the perspective of family physicians: a qualitative study 2021 ·The Journal of Infection in Developing Countries ·Salih Hoşoğlu, Annika Y. Claßen, Zekeriya Aktürk	2
11	Pre-medication with oral anticoagulants is associated with better outcomes in a large multinational COVID-19 cohort with cardiovascular comorbidities 2021 ·Clinical Research in Cardiology ·Marina Rieder, (unknown), Klaus Kaier, Carolin Jakob, Stefan Borgmann, Annika Y. Claßen, Jochen Schneider, Lukas Eberwein, Martin Lablans, Maria Madeleine Rüthrich, Sebastian Dolff, Kai Wille, (unknown), (unknown), Christoph Bode, Constantin von zur Mühlen, Siegbert Rieg, Daniel Duerschmied	5
12	Die COVID-19 Pandemie als Herausforderung und Chance für Register in der Versorgungsforschung: Erfahrungen aus Lean European Open Survey on SARS-CoV-2 Infected Patients (LEOSS) 2021 ·Das Gesundheitswesen ·Lisa Pilgram, Maximilian Schons, Carolin Jakob, Annika Y. Claßen, Bernd Franke, (unknown), (unknown), (unknown), (unknown), (unknown), Fabian Praßer, Melanie Stecher, Jörg Janne Vehreschild	7
13	COVID-19 in cancer patients: Clinical characteristics and outcome - a first analysis of the LEOSS registry 2020 ·Kölner Universitäts PublikationsServer (Universität zu Köln) ·(unknown), (unknown), Lukas Tometten, Stefan Borgmann, Jochen Schneider, Sebastian Dolff, Frank Hanses, Jim C. Norman, Nora Isberner, Marian S. Wettstein, Annika Y. Claßen, Maximilian Schons, Jörg Janne Vehreschild, Clemens Gießen-Jung, Gernot Beutel, Marie von Lilienfeld‐Toal, Kai Wille	0
14	Elevated markers of thrombo-inflammatory activation predict outcome in patients with cardiovascular comorbidities and COVID-19 disease: insights from the LEOSS registry 2020 ·Clinical Research in Cardiology ·Sebastian Cremer, Carolin Jakob, Alexander Berkowitsch, Stefan Borgmann, Lisa Pilgram, Lukas Tometten, Annika Y. Claßen, Kai Wille, (unknown), Beate Gruener, Stefanie Dimmeler, Steffen Maßberg, Siegbert Rieg, Andreas M. Zeiher, (unknown)	18
15	Central venous catheter–related infections in hematology and oncology: 2020 updated guidelines on diagnosis, management, and prevention by the Infectious Diseases Working Party (AGIHO) of the German Society of Hematology and Medical Oncology (DGHO) 2020 ·Annals of Hematology ·Boris Böll, Enrico Schalk, Dieter Buchheidt, Justin Hasenkamp, Michael Kiehl, (unknown), Matthias Kochanek, Michael Koldehoff, Philippe Kostrewa, Annika Y. Claßen, Sibylle C. Mellinghoff, Bernd Metzner, Olaf Penack, Markus Ruhnke, Maria J. G. T. Vehreschild, Florian Weißinger, Hans‐Heinrich Wolf, Meinolf Karthaus, Marcus Hentrich	78
16	Management of sepsis in neutropenic cancer patients: 2018 guidelines from the Infectious Diseases Working Party (AGIHO) and Intensive Care Working Party (iCHOP) of the German Society of Hematology and Medical Oncology (DGHO) 2019 ·Annals of Hematology ·Matthias Kochanek, Enrico Schalk, Michael von Bergwelt‐Baildon, Gernot Beutel, Dieter Buchheidt, Marcus Hentrich, Larissa Henze, Michael Kiehl, Tobias Liebregts, Marie von Lilienfeld‐Toal, Annika Y. Claßen, Sibylle C. Mellinghoff, Olaf Penack, Christiane Piepel, Boris Böll	100
17	Intravenous and tablet formulation of posaconazole in antifungal therapy and prophylaxis: A retrospective, non-interventional, multicenter analysis of hematological patients treated in tertiary-care hospitals 2019 ·International Journal of Infectious Diseases ·Sebastian Heimann, Olaf Penack, Werner Heinz, Tobias Rachow, Gerlinde Egerer, Johanna Kessel, Annika Y. Claßen, Jörg Janne Vehreschild	11
18	Bridging antifungal prophylaxis with 50 mg or 100 mg micafungin in allogeneic stem cell transplantation: A retrospective analysis 2019 ·European Journal Of Haematology ·Achim Rothe, Annika Y. Claßen, Jonathan Carney, Michael Hallek, Sibylle C. Mellinghoff, Christoph Scheid, Udo Holtick, Michael von Bergwelt‐Baildon	6
19	Systematic Review and Meta-analysis of Treatment Interruptions in Human Immunodeficiency Virus (HIV) Type 1–infected Patients Receiving Antiretroviral Therapy: Implications for Future HIV Cure Trials 2019 ·Clinical Infectious Diseases ·Melanie Stecher, Annika Y. Claßen, Florian Klein, Clara Lehmann, Henning Gruell, Martin Platten, Christoph Wyen, Georg M. N. Behrens, Gerd Fätkenheuer, Jörg Janne Vehreschild	11
20	2474. The 10 Years Scientific Contribution of the Cologne Cohort of Neutropenic Patients (CoCoNut) for Evaluating Treatment and Outcome of Healthcare-associated Infections 2019 ·Open Forum Infectious Diseases ·Carolin Jakob, Sebastian Heimann, Annika Y. Claßen, (unknown), (unknown), Udo Holtick, Christof Scheid, Oliver A. Cornely, Jörg Janne Vehreschild	1

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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