Alexander Hagel

1.4k total citations
44 papers, 735 citations indexed

About

Alexander Hagel is a scholar working on Surgery, Gastroenterology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Alexander Hagel has authored 44 papers receiving a total of 735 indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Surgery, 11 papers in Gastroenterology and 9 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Alexander Hagel's work include Eosinophilic Esophagitis (8 papers), Esophageal and GI Pathology (8 papers) and Gastric Cancer Management and Outcomes (6 papers). Alexander Hagel is often cited by papers focused on Eosinophilic Esophagitis (8 papers), Esophageal and GI Pathology (8 papers) and Gastric Cancer Management and Outcomes (6 papers). Alexander Hagel collaborates with scholars based in Germany, United States and Switzerland. Alexander Hagel's co-authors include Markus F. Neurath, Martin Raithel, Wolfgang Dauth, David Wohlrab, W. Hein, Martin Raithel, Heinz Albrecht, Hermann Keßler, Klaus E. Matzel and Andreas Naegel and has published in prestigious journals such as Gastroenterology, Allergy and Surgical Endoscopy.

In The Last Decade

Alexander Hagel

43 papers receiving 696 citations

Peers

Alexander Hagel

SURGE

PRM

GASTR

ONCOL

Francesco Vitali Germany

Koichi Taira Japan

Prakash K. Pandalai United States

Risa Takahata Japan

Amber L. Shada United States

H. Renner Austria

J. B. Neilly United Kingdom

Carlos Serra Spain

J.D. Esser South Africa

Kenji Yamazaki Japan

Francesco Vitali Germany

Alexander Hagel

211 ×0.5

SURGE

102 ×0.6

PRM

105 ×0.8

GASTR

24 ×0.3

149 ×2.1

ONCOL

Citations per year, relative to Alexander Hagel Alexander Hagel (= 1×) peers Francesco Vitali

Countries citing papers authored by Alexander Hagel

Since Specialization

Citations

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

Fields of papers citing papers by Alexander Hagel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Alexander Hagel

This figure shows the co-authorship network connecting the top 25 collaborators of Alexander Hagel. A scholar is included among the top collaborators of Alexander Hagel 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 Alexander Hagel. Alexander Hagel 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

Vollbracht, Claudia, et al.. (2018). Intravenous vitamin C in the treatment of allergies: an interim subgroup analysis of a long-term observational study. Journal of International Medical Research. 46(9). 3640–3655. 29 indexed citations

Hagel, Alexander, Heinz Albrecht, Wolfgang Dauth, et al.. (2017). Plasma concentrations of ascorbic acid in a cross section of the German population. Journal of International Medical Research. 46(1). 168–174. 62 indexed citations

Albrecht, Heinz, et al.. (2017). The impact of hospitalization on the performance of capsule endoscopy (CE). Digestive and Liver Disease. 49(6). 647–650. 2 indexed citations

Wein, Axel, Juergen Siebler, Kerstin Wolff, et al.. (2017). Weekly High-dose 5-Fluorouracil as 24-hour Infusion Combined with Sodium Folinic Acid (AIO regimen) Plus Irinotecan in Second-line and Sequential Therapy of Metastatic Colorectal Cancer (CRC). Anticancer Research. 37(7). 3771–3779. 3 indexed citations

Waldner, Maximilian J., Ferdinand Knieling, Stefan Morscher, et al.. (2016). Multispectral Optoacoustic Tomography in Crohn’s Disease: Noninvasive Imaging of Disease Activity. Gastroenterology. 151(2). 238–240. 52 indexed citations

Albrecht, Heinz, et al.. (2016). Double-Balloon Enteroscopy-detected Lipid Islets in the Small Bowel are Strong Predictors of Cardiovascular Disease when associated with Angiectasia and Bleeding. Journal of Gastrointestinal and Liver Diseases. 25(1). 33–37. 1 indexed citations

Albrecht, Heinz, W Scheppach, Michael Farnbacher, et al.. (2016). Outcome, comorbidity, hospitalization and 30-day mortality after closure of acute perforations and postoperative anastomotic leaks by the over-the-scope clip (OTSC) in an unselected cohort of patients. Surgical Endoscopy. 31(6). 2411–2425. 28 indexed citations

Wein, Axel, Jürgen Siebler, Ruediger S. Goertz, et al.. (2016). Successful Multidisciplinary Treatment with Secondary Metastatic Liver Resection after Downsizing by Palliative Second-Line Treatment of Colorectal Cancer: A Curative Option. Case Reports in Oncology. 9(2). 379–386. 1 indexed citations

Raithel, Martin, Alexander Hagel, Heinz Albrecht, et al.. (2015). Excretion of urinary histamine and N-tele methylhistamine in patients with gastrointestinal food allergy compared to non-allergic controls during an unrestricted diet and a hypoallergenic diet. BMC Gastroenterology. 15(1). 41–41. 11 indexed citations

10.

Hagel, Alexander, et al.. (2015). Arthroscopic treatment of bilateral snapping scapula syndrome: a case report and review of the literature. Acta Orthopaedica et Traumatologica Turcica. 49(1). 91–96. 7 indexed citations

11.

Albrecht, Heinz, Alexander Hagel, Tilman T. Rau, et al.. (2014). Brown Bowel Syndrome: A Rare Complication in Diseases Associated with Long-Standing Malabsorption. Digestion. 89(2). 105–109. 10 indexed citations

12.

Ganslmayer, Marion, Alexander Hagel, Wolfgang Dauth, et al.. (2014). A large cohort of patients with hepatocellular carcinoma in a single European centre: aetiology and prognosis now and in a historical cohort. Swiss Medical Weekly. 144(304). w13900–w13900. 10 indexed citations

13.

Hahn, Markus, Alexander Hagel, Simon Hirschmann, et al.. (2014). Modern diagnosis of celiac disease and relevant differential diagnoses in the case of cereal intolerance. Allergo Journal International. 23(2). 67–77. 12 indexed citations

14.

Raithel, Martin, et al.. (2013). The Malabsorption of Commonly Occurring Mono and Disaccharides. Deutsches Ärzteblatt international. 110(46). 775–82. 30 indexed citations

15.

Hagel, Alexander, Christian Layritz, Wolfgang Dauth, et al.. (2013). Intravenous infusion of ascorbic acid decreases serum histamine concentrations in patients with allergic and non-allergic diseases. Naunyn-Schmiedeberg s Archives of Pharmacology. 386(9). 789–793. 43 indexed citations

16.

Hahn, Markus, Martin Raithel, Alexander Hagel, Teresa Biermann, & Bernhard Manger. (2012). Chronic calcium pyrophosphate crystal inflammatory arthritis induced by extreme hypomagnesemia in short bowel syndrome. BMC Gastroenterology. 12(1). 129–129. 7 indexed citations

17.

Hagel, Alexander, Yurdagül Zopf, Peter C. Konturek, et al.. (2012). Mast Cell Tryptase Levels in Gut Mucosa in Patients with Gastrointestinal Symptoms Caused by Food Allergy. International Archives of Allergy and Immunology. 160(4). 350–355. 19 indexed citations

18.

Hagel, Alexander, Thomas M. Rossi, Yurdagül Zopf, et al.. (2011). Small‐bowel capsule endoscopy in patients with gastrointestinal food allergy. Allergy. 67(2). 286–292. 13 indexed citations

19.

Nägel, Andreas, et al.. (2010). Plasma histamine levels (H) during adjunctive H1-receptor antagonist treatment with loratadine in patients with active Inflammatory Bowel disease (IBD). Inflammation Research. 59(S2). 257–258. 11 indexed citations

20.

Wohlrab, David, Alexander Hagel, & W. Hein. (2004). Vorteile der minimalinvasiven Implantation von Hüfttotalendoprothesen in der frühen postoperativen Rehabilitationsphase. Zeitschrift für Orthopädie und ihre Grenzgebiete. 142(6). 685–690. 56 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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