This map shows the geographic impact of Lefer Am'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 Lefer Am with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Lefer Am more than expected).
This network shows the impact of papers produced by Lefer Am. 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 Lefer Am. The network helps show where Lefer Am may publish in the future.
Co-authorship network of co-authors of Lefer Am
This figure shows the co-authorship network connecting the top 25 collaborators of Lefer Am.
A scholar is included among the top collaborators of Lefer Am 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 Lefer Am. Lefer Am is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Am, Lefer, et al.. (1993). Endothelial dysfunction and neutrophil adherence as critical events in the development of reperfusion injury.. PubMed. 41. 127–35.53 indexed citations
Johnson, Gregory L. & Lefer Am. (1990). Protective effects of a novel 21-aminosteroid during splanchnic artery occlusion shock.. PubMed. 30(2). 155–64.18 indexed citations
6.
Am, Lefer. (1989). Platelet activating factor (PAF) and its role in cardiac injury.. PubMed. 301. 53–60.5 indexed citations
7.
Aoki, N, et al.. (1988). Beneficial mechanisms of action of a prostacyclin enhancing agent in splanchnic artery occlusion shock.. PubMed. 60(3). 275–89.6 indexed citations
8.
Yanagisawa, Atsuo, et al.. (1987). Beneficial actions of the thromboxane receptor antagonist, AH-23,848, in acute myocardial ischemia.. PubMed. 9(11). 703–9.4 indexed citations
9.
Am, Lefer, et al.. (1987). Mechanisms of platelet-activating factor-induced cardiac depression in the isolated perfused rat heart.. PubMed. 23(3). 165–77.15 indexed citations
10.
Am, Lefer, et al.. (1986). Anti-shock actions of the pyrimido-pyrimidine derivative, RA-642.. PubMed. 8(5). 265–9.
11.
Jb, Smith, et al.. (1980). Thromboxane A2, prostacyclin and aspirin: effects on vascular tone and platelet aggregation.. PubMed. 62(6 Pt 2). V19–25.72 indexed citations
12.
Am, Lefer, et al.. (1978). Preservation of cellular integrity as a protective mechanism of dexamethasone in hemorrhagic shock in the cat.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 232(2). 309–20.3 indexed citations
13.
Am, Lefer, et al.. (1978). Amelioration of splanchnic artery occlusion (SAO) shock by cysteine.. PubMed. 1. 261–70.1 indexed citations
Sl, Wangensteen, et al.. (1971). Relationship between splanchnic blood flow and a myocardial depressant factor in endotoxin shock.. PubMed. 69(3). 410–8.36 indexed citations
16.
Morris, et al.. (1971). Influence of lysosomal enzymes on circulatory function.. PubMed. 22. 14–6.1 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.