Hansjoerg Ullerich

700 total citations
25 papers, 502 citations indexed

About

Hansjoerg Ullerich is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Hansjoerg Ullerich has authored 25 papers receiving a total of 502 indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Surgery, 13 papers in Pulmonary and Respiratory Medicine and 7 papers in Oncology. Recurrent topics in Hansjoerg Ullerich's work include Gallbladder and Bile Duct Disorders (10 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (7 papers) and Esophageal and GI Pathology (6 papers). Hansjoerg Ullerich is often cited by papers focused on Gallbladder and Bile Duct Disorders (10 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (7 papers) and Esophageal and GI Pathology (6 papers). Hansjoerg Ullerich collaborates with scholars based in Germany, Italy and United States. Hansjoerg Ullerich's co-authors include Frank Lenze, Hauke Heinzow, Arne Bokemeyer, Wolfram Domschke, Dominik Bettenworth, Tobias M. Nowacki, Christian Maaser, Torsten Kucharzik, Andreas Luegering and Hartmut Schmidt and has published in prestigious journals such as Gastroenterology, Gut and Scientific Reports.

In The Last Decade

Hansjoerg Ullerich

24 papers receiving 489 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hansjoerg Ullerich Germany 13 368 302 164 89 62 25 502
Takatsugu Oida Japan 13 350 1.0× 241 0.8× 178 1.1× 38 0.4× 21 0.3× 91 457
Kenji Mimatsu Japan 12 332 0.9× 225 0.7× 166 1.0× 37 0.4× 20 0.3× 90 429
Ji Hun Kim South Korea 13 350 1.0× 296 1.0× 193 1.2× 21 0.2× 21 0.3× 25 483
Orhan Bulut Denmark 14 371 1.0× 111 0.4× 337 2.1× 67 0.8× 15 0.2× 57 486
Igor Khatkov Russia 11 341 0.9× 239 0.8× 323 2.0× 27 0.3× 13 0.2× 56 503
Joshua G. Barton United States 9 264 0.7× 90 0.3× 222 1.4× 13 0.1× 42 0.7× 13 342
Kiran Altaf United Kingdom 11 334 0.9× 204 0.7× 305 1.9× 37 0.4× 6 0.1× 24 456
Youichi Kuboi Japan 12 314 0.9× 197 0.7× 144 0.9× 36 0.4× 16 0.3× 79 373
Kenji Kakisako Japan 10 241 0.7× 291 1.0× 187 1.1× 149 1.7× 11 0.2× 21 458
Ahmet Rencüzoğulları Türkiye 11 264 0.7× 60 0.2× 176 1.1× 15 0.2× 48 0.8× 62 408

Countries citing papers authored by Hansjoerg Ullerich

Since Specialization
Citations

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

Fields of papers citing papers by Hansjoerg Ullerich

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hansjoerg Ullerich

This figure shows the co-authorship network connecting the top 25 collaborators of Hansjoerg Ullerich. A scholar is included among the top collaborators of Hansjoerg Ullerich 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 Hansjoerg Ullerich. Hansjoerg Ullerich 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.
Ullerich, Hansjoerg, et al.. (2024). Long-Term Quality of Life after COVID-19 Infection: Cross-Sectional Study of Health Care Workers. International Journal of Environmental Research and Public Health. 21(2). 235–235. 2 indexed citations
2.
Laleman, Wim, et al.. (2023). Role of endoscopy in hepatology. Digestive and Liver Disease. 56(7). 1185–1195. 5 indexed citations
3.
Schmidt, Hartmut, Phil‐Robin Tepasse, Jonel Trebicka, et al.. (2023). Elevated Liver Fibrosis Progression in Isolated PSC Patients and Increased Malignancy Risk in a PSC-IBD Cohort: A Retrospective Study. International Journal of Molecular Sciences. 24(20). 15431–15431. 4 indexed citations
4.
Bokemeyer, Arne, et al.. (2022). Digital single-operator video cholangioscopy improves endoscopic management in patients with primary sclerosing cholangitis-a retrospective observational study. World Journal of Gastroenterology. 28(20). 2201–2213. 8 indexed citations
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Bokemeyer, Arne, Dominik Bettenworth, Friederike Cordes, et al.. (2019). Endoscopic Radiofrequency Ablation Prolongs Survival of Patients with Unresectable Hilar Cholangiocellular Carcinoma - A Case-Control Study. Scientific Reports. 9(1). 13685–13685. 45 indexed citations
7.
Cordes, Friederike, Christian Ellermann, Jan Ehrchen, Hansjoerg Ullerich, & Lars Eckardt. (2019). Diagnosis and management of cold urticaria in cryoablation of atrial fibrillation: a case report. European Heart Journal - Case Reports. 3(4). 1–5. 3 indexed citations
8.
Bokemeyer, Arne, Christian Gerges, Dominik Bettenworth, et al.. (2019). Digital single-operator video cholangioscopy in treating refractory biliary stones: a multicenter observational study. Surgical Endoscopy. 34(5). 1914–1922. 19 indexed citations
9.
Bokemeyer, Arne, Markus Brückner, Tobias M. Nowacki, et al.. (2018). Digital single-operator cholangioscopy: a useful tool for selective guidewire placements across complex biliary strictures. Surgical Endoscopy. 33(3). 731–737. 37 indexed citations
10.
Ullerich, Hansjoerg, et al.. (2018). Circulating microRNA-99 family as liquid biopsy marker in pancreatic adenocarcinoma. Journal of Cancer Research and Clinical Oncology. 144(12). 2377–2390. 23 indexed citations
11.
Lenze, Frank, et al.. (2018). Safety, diagnostic accuracy and therapeutic efficacy of digital single‐operator cholangioscopy. United European Gastroenterology Journal. 6(6). 902–909. 46 indexed citations
12.
Ullerich, Hansjoerg, et al.. (2018). The ambiguous role of microRNA-205 and its clinical potential in pancreatic ductal adenocarcinoma. Journal of Cancer Research and Clinical Oncology. 144(12). 2419–2431. 12 indexed citations
13.
Lenze, Frank, Tobias M. Nowacki, Tors ten Beyna, & Hansjoerg Ullerich. (2017). Direct peroral cholangioscopy with a new anchoring technique using the guide probe of Kautz – first clinical experiences. Endoscopy. 49(9). 909–912. 7 indexed citations
14.
Neumann, Philipp‐Alexander, Mike G. Laukoetter, Dominik Bettenworth, et al.. (2016). Solving a disaster following coronary bypass operation. Gut. 65(10). 1601–1601. 1 indexed citations
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Heinzow, Hauke, et al.. (2011). Single-step versus multi-step transmural drainage of pancreatic pseudocysts: The use of cystostome is effective and timesaving. Scandinavian Journal of Gastroenterology. 46(7-8). 1004–1013. 12 indexed citations
18.
Heinzow, Hauke, Tobias Meister, Johannes Weßling, Wolfram Domschke, & Hansjoerg Ullerich. (2010). Ileal gallstone obstruction: Single-balloon enteroscopic removal. World Journal of Gastrointestinal Endoscopy. 2(9). 321–321. 6 indexed citations
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Maaser, Christian, Frank Lenze, Hansjoerg Ullerich, et al.. (2008). Double Balloon Enteroscopy: A Useful Tool for Diagnostic and Therapeutic Procedures in the Pancreaticobiliary System. The American Journal of Gastroenterology. 103(4). 894–900. 81 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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