A Schäfer

937 total citations
15 papers, 725 citations indexed

About

A Schäfer is a scholar working on Transplantation, Surgery and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, A Schäfer has authored 15 papers receiving a total of 725 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Transplantation, 7 papers in Surgery and 7 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in A Schäfer's work include Renal Transplantation Outcomes and Treatments (11 papers), Pharmacological Effects and Toxicity Studies (7 papers) and Organ Transplantation Techniques and Outcomes (6 papers). A Schäfer is often cited by papers focused on Renal Transplantation Outcomes and Treatments (11 papers), Pharmacological Effects and Toxicity Studies (7 papers) and Organ Transplantation Techniques and Outcomes (6 papers). A Schäfer collaborates with scholars based in Germany, Netherlands and Spain. A Schäfer's co-authors include Nasrullah Undre, J van Hooff, Maarten H. L. Christiaans, A. Möller, Paul Stevenson, Gerhard Opelz, Akio Kawamura, Kenji Iwasaki, Toshifumi Shiraga and K. Dreikorn and has published in prestigious journals such as Journal of Agricultural and Food Chemistry, Transplantation and Analytical and Bioanalytical Chemistry.

In The Last Decade

A Schäfer

14 papers receiving 685 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
A Schäfer Germany 11 574 378 223 130 115 15 725
Nauras Shuker Netherlands 11 659 1.1× 369 1.0× 264 1.2× 171 1.3× 113 1.0× 16 734
Michael Heifets United States 15 416 0.7× 85 0.2× 242 1.1× 96 0.7× 195 1.7× 25 797
Lyndsey J. Bowman United States 11 201 0.4× 67 0.2× 137 0.6× 54 0.4× 72 0.6× 27 519
R J Ptachcinski United States 12 214 0.4× 195 0.5× 105 0.5× 25 0.2× 28 0.2× 24 443
Antoine Petitcollin France 16 157 0.3× 113 0.3× 108 0.5× 27 0.2× 115 1.0× 25 575
Evan M. Cadoff United States 11 122 0.2× 75 0.2× 116 0.5× 22 0.2× 104 0.9× 22 530
C Stiller Canada 6 187 0.3× 111 0.3× 102 0.5× 38 0.3× 20 0.2× 11 282
Denise H. Fleming India 11 109 0.2× 72 0.2× 47 0.2× 65 0.5× 36 0.3× 21 326
Amel Chaabane Tunisia 13 81 0.1× 87 0.2× 51 0.2× 28 0.2× 77 0.7× 72 504
Gomathy Narasimhan India 13 149 0.3× 30 0.1× 382 1.7× 22 0.2× 112 1.0× 35 705

Countries citing papers authored by A Schäfer

Since Specialization
Citations

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

Fields of papers citing papers by A Schäfer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of A Schäfer

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

All Works

15 of 15 papers shown
1.
Schäfer, A, Walter Vetter, & Michelangelo Anastassiades. (2025). Improved Analysis of Glyphosate, Aminomethylphosphonic Acid, and Other Highly Polar Pesticides and Metabolites via the QuPPe Method by Employing Ethylenediaminetetraacetic Acid and IC-MS/MS. Journal of Agricultural and Food Chemistry. 73(4). 2645–2652. 3 indexed citations
2.
Schäfer, A, Walter Vetter, & Michelangelo Anastassiades. (2025). Analysis of several anionic polar pesticides in food of plant and animal origin using QuPPe extraction and CE-MS/MS determination. Analytical and Bioanalytical Chemistry. 417(21). 4739–4752.
3.
Schäfer, A, Walter Vetter, & Michelangelo Anastassiades. (2024). Analysis of highly polar anionic pesticides in food of plant and animal origin by ion chromatography and tandem mass spectrometry with emphasis on addressing adverse effects caused by matrix co-extractives. Analytical and Bioanalytical Chemistry. 416(20). 4503–4517. 7 indexed citations
4.
Lehmann, Janin, Steffen Schubert, A Schäfer, et al.. (2014). A novel mutation in the XPA gene results in two truncated protein variants and leads to a severe XP/neurological symptoms phenotype. Journal of the European Academy of Dermatology and Venereology. 29(12). 2479–2482. 5 indexed citations
5.
Braun, Felix, Ekkehard Schütz, Clemens Grupp, et al.. (2001). Pharmacokinetics of tacrolimus primary immunosuppression in kidney transplant recipients. Transplantation Proceedings. 33(3). 2127–2128. 24 indexed citations
6.
Undre, N., J van Hooff, Maarten H. L. Christiaans, et al.. (1999). Low systemic exposure to tacrolimus correlates with acute rejection. Transplantation Proceedings. 31(1-2). 296–298. 148 indexed citations
7.
Undre, Nasrullah, Paul Stevenson, & A Schäfer. (1999). Pharmacokinetics of tacrolimus: clinically relevant aspects. Transplantation Proceedings. 31(7). 21–24. 61 indexed citations
8.
Möller, A., Kenji Iwasaki, Akio Kawamura, et al.. (1999). The Disposition of 14C-Labeled Tacrolimus after Intravenous and Oral Administration in Healthy Human Subjects. Drug Metabolism and Disposition. 27(6). 633–636. 130 indexed citations
9.
Undre, Nasrullah, J van Hooff, Maarten H. L. Christiaans, et al.. (1998). Pharmacokinetics of FK 506 and Mycophenolic Acid After the Administration of a FK 506–Based Regimen in Combination With Mycophenolate Mofetil in Kidney Transplantation. Transplantation Proceedings. 30(4). 1299–1302. 36 indexed citations
10.
Christiaans, Maarten H. L., et al.. (1998). Tacrolimus Dosing Requirements in Diabetic and Nondiabetic Patients Calculated From Pretransplantation Data. Transplantation Proceedings. 30(4). 1266–1267. 17 indexed citations
11.
Undre, Nasrullah, P Überfuhr, Bruno Reichart, et al.. (1998). Pharmacokinetics of Tacrolimus (FK506) in Primary Orthotopic Heart Transplant Patients. Transplantation Proceedings. 30(4). 1112–1115. 14 indexed citations
12.
Christiaans, Maarten H. L., et al.. (1998). Effect of Breakfast on the Oral Bioavailability of Tacrolimus and Changes in Pharmacokinetics at Different Times Posttransplant in Renal Transplant Recipients. Transplantation Proceedings. 30(4). 1271–1273. 51 indexed citations
13.
Wallemacq, Pierre, V. Furlan, A. Möller, et al.. (1998). Pharmacokinetics of tacrolimus (FK506) in paediatric liver transplant recipients. European Journal of Drug Metabolism and Pharmacokinetics. 23(3). 367–370. 73 indexed citations
14.
Undre, Nasrullah & A Schäfer. (1998). Factors Affecting the Pharmacokinetics of Tacrolimus in the First Year After Renal Transplantation. Transplantation Proceedings. 30(4). 1261–1263. 93 indexed citations
15.
Schäfer, A, Volker Daniel, K. Dreikorn, & Gerhard Opelz. (1986). ASSESSMENT OF PLASMA NEOPTERIN IN CLINICAL KIDNEY TRANSPLANTATION. Transplantation. 41(4). 454–458. 63 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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