Johannes Claßen

2.6k total citations
38 papers, 910 citations indexed

About

Johannes Claßen is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Johannes Claßen has authored 38 papers receiving a total of 910 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Surgery, 15 papers in Pulmonary and Respiratory Medicine and 11 papers in Oncology. Recurrent topics in Johannes Claßen's work include Testicular diseases and treatments (14 papers), Advanced Radiotherapy Techniques (5 papers) and Sarcoma Diagnosis and Treatment (5 papers). Johannes Claßen is often cited by papers focused on Testicular diseases and treatments (14 papers), Advanced Radiotherapy Techniques (5 papers) and Sarcoma Diagnosis and Treatment (5 papers). Johannes Claßen collaborates with scholars based in Germany, United States and Switzerland. Johannes Claßen's co-authors include Michael Bamberg, Rainer Souchon, Branislav Jeremić, Thomas Hehr, Heinz Schmidberger, Klaus‐Peter Dieckmann, S. Weinknecht, Christoph Meisner, Markus A. Kuczyk and Wilfried Budach and has published in prestigious journals such as Journal of Clinical Oncology, Gastroenterology and The Journal of Urology.

In The Last Decade

Johannes Claßen

38 papers receiving 887 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Johannes Claßen Germany 18 554 333 188 178 153 38 910
L. Vini United Kingdom 18 507 0.9× 301 0.9× 230 1.2× 75 0.4× 85 0.6× 27 1.3k
J. Bouzy France 9 437 0.8× 108 0.3× 97 0.5× 181 1.0× 183 1.2× 19 757
Lucien E. Nochomovitz United States 18 445 0.8× 247 0.7× 234 1.2× 133 0.7× 77 0.5× 38 800
Judith Huart France 19 735 1.3× 242 0.7× 79 0.4× 67 0.4× 248 1.6× 24 1.6k
R Rozan France 13 362 0.7× 168 0.5× 100 0.5× 33 0.2× 58 0.4× 32 835
B. van der Werf‐Messing Netherlands 18 555 1.0× 463 1.4× 108 0.6× 102 0.6× 76 0.5× 34 1000
Hisayasu Nagakura Japan 14 342 0.6× 162 0.5× 61 0.3× 87 0.5× 30 0.2× 40 656
Jan Oldhoff Netherlands 18 272 0.5× 360 1.1× 164 0.9× 116 0.7× 51 0.3× 28 719
Francisco H. Dexeus United States 14 562 1.0× 287 0.9× 120 0.6× 168 0.9× 98 0.6× 21 866
Stefan Könemann Germany 15 170 0.3× 427 1.3× 150 0.8× 69 0.4× 84 0.5× 26 643

Countries citing papers authored by Johannes Claßen

Since Specialization
Citations

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

Fields of papers citing papers by Johannes Claßen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Johannes Claßen

This figure shows the co-authorship network connecting the top 25 collaborators of Johannes Claßen. A scholar is included among the top collaborators of Johannes 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 Johannes Claßen. Johannes Claßen 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.
Eßer, Stefan, Helmut Schöfer, Christian Hoffmann, et al.. (2022). S1‐Leitlinie: Kaposi‐Sarkom. JDDG Journal der Deutschen Dermatologischen Gesellschaft. 20(6). 892–905. 2 indexed citations
2.
Heinzelbecker, Julia, Stefanie Schmidt, Jonas Busch, et al.. (2021). Therapy of clinical stage IIA and IIB seminoma: a systematic review. World Journal of Urology. 40(12). 2829–2841. 9 indexed citations
3.
4.
Paulsen, Frank, et al.. (2011). Fractionated Stereotactic Radiotherapy in Patients With Optic Nerve Sheath Meningioma. International Journal of Radiation Oncology*Biology*Physics. 82(2). 773–778. 52 indexed citations
5.
6.
Dieckmann, Klaus‐Peter, et al.. (2008). Is increased body mass index associated with the incidence of testicular germ cell cancer?. Journal of Cancer Research and Clinical Oncology. 135(5). 731–738. 23 indexed citations
7.
Souchon, Rainer, Wilfried Budach, & Johannes Claßen. (2006). Radiooncological Aspects Regarding Multimodal Primary Treatment of Breast Cancer – a Review. Breast Care. 1(6). 379–389. 1 indexed citations
8.
Hehr, Thomas, Johannes Claßen, Stefan Welz, et al.. (2006). Hyperfractionated, accelerated chemoradiation with concurrent mitomycin-C and cisplatin in locally advanced head and neck cancer, a phase I/II study. Radiotherapy and Oncology. 80(1). 33–38. 18 indexed citations
9.
Hehr, Thomas, Johannes Claßen, Claus Belka, et al.. (2005). Reirradiation alternating with docetaxel and cisplatin in inoperable recurrence of head-and-neck cancer: A prospective phase I/II trial. International Journal of Radiation Oncology*Biology*Physics. 61(5). 1423–1431. 33 indexed citations
10.
Dittmann, Klaus, Mahmoud Toulany, Johannes Claßen, et al.. (2005). Selective Radioprotection of Normal Tissues by Bowman-Birk Proteinase Inhibitor (BBI) in Mice. Strahlentherapie und Onkologie. 181(3). 191–196. 17 indexed citations
11.
Hehr, Thomas, et al.. (2004). Postmastectomy Radiotherapy of the Chest Wall. Strahlentherapie und Onkologie. 180(10). 629–636. 17 indexed citations
12.
Hehr, Thomas, et al.. (2004). Hyperfractionated accelerated radiotherapy alone and with concomitant chemotherapy to the head and neck: treated within and outside of randomized clinical trials. International Journal of Radiation Oncology*Biology*Physics. 58(5). 1424–1430. 3 indexed citations
13.
Dieckmann, Klaus‐Peter, Johannes Claßen, & V. Loy. (2003). Diagnosis and management of testicular intraepithelial neoplasia (carcinoma in situ) – surgical aspects. Apmis. 111(1). 64–69. 17 indexed citations
14.
Hehr, Thomas, et al.. (2002). Selective Lymph Node Dissection Following Hyperfractionated Accelerated Radio-(Chemo-)Therapy for Advanced Head and Neck Cancer. Strahlentherapie und Onkologie. 178(7). 363–368. 15 indexed citations
15.
Claßen, Johannes, Rainer Souchon, Thomas Hehr, & Michael Bamberg. (2002). Radiotherapy for early stages testicular seminoma: patterns of care study in Germany. Radiotherapy and Oncology. 63(2). 179–186. 11 indexed citations
16.
Claßen, Johannes, Frank Paulsen, Thomas Hehr, Michael Bamberg, & Wilfried Budach. (2002). Effect of gemcitabine on acute and late radiation toxicity of skin and underlying soft tissues to single-dose irradiation in a nude mice model. International Journal of Radiation Oncology*Biology*Physics. 53(1). 197–205. 7 indexed citations
17.
Souchon, Rainer, S. Krege, Hans‐Joachim Schmoll, et al.. (2000). Interdisziplinärer Konsensus zur Diagnostik und Therapie von Hodentumoren Ergebnisse einer Update-Konferenz auf Grundlage evidenzbasierter Medizin (EBM): Ergebnisse einer Update-Konferenz auf Grundlage evidenzbasierter Medizin (EBM). Strahlentherapie und Onkologie. 176(9). 388–405. 1 indexed citations
18.
Bamberg, Michael, Heinz Schmidberger, Christoph Meisner, et al.. (1999). Radiotherapy for stages I and IIA/B testicular seminoma. International Journal of Cancer. 83(6). 823–827. 37 indexed citations
19.
Schmidberger, Heinz, Michael Bamberg, C Meisner, et al.. (1997). Radiotherapy in stage IIA and IIB testicular seminoma with reduced portals: A prospective multicenter study. International Journal of Radiation Oncology*Biology*Physics. 39(2). 321–326. 39 indexed citations
20.
Claßen, Johannes. (1977). Beobachtungen über den homerischen Sprachgebrauch. Bulletin of Miscellaneous Information (Royal Gardens Kew). 2 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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